STI COMANDANTE

IMO 9686857

Vessel information

Vessel Name STI COMANDANTE
IMO Number 9686857
MMSI 538005397
Vessel Type Tanker
Flag 🏳️ Marshall Is
Call Sign V7DL6
Length 184 m
Beam 27 m

Detected Events (100)

Sts🛰️⏳ Southern Öresund Surveillance Zone
Oct 28, 2026 17:44 UTC 65/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9335147 (KRITI CAPTAIN) Liberia
  • Minimum Distance: 296 meters
  • Average Distance: 299 meters
  • Duration: 36 minutes
  • Period: 2026-10-28T17:44:53+00:00 to 2026-10-28T18:20:55+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 296m, avg 298m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 296m, avg 298m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

⏳ SAR Pending

Satellite imagery search queued

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "min_distance_m": 295.5,
    "avg_distance_m": 298.5,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 36,
    "overlap_duration_s": 2162,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T17:44:53+00:00",
        "end": "2026-10-28T18:20:55+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 296m, avg 298m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 296m, avg 298m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "pending"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 14:23 UTC 75/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 296 meters
  • Average Distance: 298 meters
  • Duration: 1 hours
  • Period: 2026-10-28T14:23:59+00:00 to 2026-10-28T15:23:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 296m, avg 298m
Duration15/25Duration 60 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T16:45:01.305938+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 295.80000000000001136868377216160297393798828125,
    "avg_distance_m": 297.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3,
    "duration_minutes": 60,
    "overlap_duration_s": 3599,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T14:23:59+00:00",
        "end": "2026-10-28T15:23:58+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 296m, avg 298m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 60 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1603228999999970483258948661386966705322265625,
            "lon": -6.89796380000000031174067771644331514835357666015625
        },
        "time_window": {
            "start_ts": "2026-10-28T14:23:59+00:00",
            "end_ts": "2026-10-28T15:23:58+00:00"
        },
        "searched_at": "2026-10-28T16:45:01.305938+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 14:20 UTC 85/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 244 meters
  • Average Distance: 247 meters
  • Duration: 2h 18m
  • Period: 2026-10-28T14:25:44+00:00 to 2026-10-28T16:43:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 244m, avg 246m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 244m, avg 246m
Duration25/25Duration 138 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 244,
    "avg_distance_m": 246.5,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 138,
    "overlap_duration_s": 8280,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T14:25:44+00:00",
        "end": "2026-10-28T16:43:44+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 244m, avg 246m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 138 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 244m, avg 246m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 12:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T12:32:56+00:00 to 2026-10-28T18:56:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T12:32:56+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.89660829999999958062062432873062789440155029296875
    },
    "last_point": {
        "ts": "2026-10-28T18:56:54+00:00",
        "lat": 37.15952829999999806886989972554147243499755859375,
        "lon": -6.89658830000000033777496355469338595867156982421875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 12:14 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 4 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 384,
    "points": 17,
    "centroid": {
        "lat": 37.159511664705888733806204982101917266845703125,
        "lon": -6.896600594117646920722108916379511356353759765625
    },
    "bbox": {
        "min_lat": 37.1594750000000004774847184307873249053955078125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15953999999999979308995534665882587432861328125,
        "max_lon": -6.8965782999999998281737134675495326519012451171875
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 11:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 12m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T11:44:56+00:00 to 2026-10-28T17:56:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 372.1000000000000227373675443232059478759765625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T11:44:56+00:00",
        "lat": 37.15948999999999813326212461106479167938232421875,
        "lon": -6.8965849999999999653255144949071109294891357421875
    },
    "last_point": {
        "ts": "2026-10-28T17:56:59+00:00",
        "lat": 37.1595166999999975132595864124596118927001953125,
        "lon": -6.896580000000000154614099301397800445556640625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 11:02 UTC 75.0% ▼
  • Duration: 6h 12m
  • Radius: 4 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 372.1000000000000227373675443232059478759765625,
    "points": 17,
    "centroid": {
        "lat": 37.15951000000001158696250058710575103759765625,
        "lon": -6.896602164705882387352176010608673095703125
    },
    "bbox": {
        "min_lat": 37.1594750000000004774847184307873249053955078125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15953999999999979308995534665882587432861328125,
        "max_lon": -6.8965782999999998281737134675495326519012451171875
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 10:31 UTC 65/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 243 meters
  • Average Distance: 245 meters
  • Duration: 35 minutes
  • Period: 2026-10-28T10:26:58+00:00 to 2026-10-28T11:02:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 243m, avg 245m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 243m, avg 245m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 242.900000000000005684341886080801486968994140625,
    "avg_distance_m": 245.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 35.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 2156,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T10:26:58+00:00",
        "end": "2026-10-28T11:02:54+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 243m, avg 245m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 243m, avg 245m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 10:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 11m
  • Data Points: 16 AIS positions
  • Period: 2026-10-28T10:26:58+00:00 to 2026-10-28T16:38:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 371.8999999999999772626324556767940521240234375,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-28T10:26:58+00:00",
        "lat": 37.1595717000000007601556717418134212493896484375,
        "lon": -6.89660999999999990706101016257889568805694580078125
    },
    "last_point": {
        "ts": "2026-10-28T16:38:54+00:00",
        "lat": 37.15950000000000130739863379858434200286865234375,
        "lon": -6.89661170000000023350139599642716348171234130859375
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 10:26 UTC 75.0% ▼
  • Duration: 6h 11m
  • Radius: 7 meters
  • Data Points: 16 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 371.8999999999999772626324556767940521240234375,
    "points": 16,
    "centroid": {
        "lat": 37.15951208125000704285412211902439594268798828125,
        "lon": -6.89660531875000071266867962549440562725067138671875
    },
    "bbox": {
        "min_lat": 37.1594750000000004774847184307873249053955078125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.8965782999999998281737134675495326519012451171875
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 09:38 UTC 75/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 243 meters
  • Average Distance: 248 meters
  • Duration: 1h 24m
  • Period: 2026-10-28T09:38:50+00:00 to 2026-10-28T11:02:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 243m, avg 248m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 243m, avg 248m
Duration15/25Duration 84 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 242.900000000000005684341886080801486968994140625,
    "avg_distance_m": 248,
    "distance_consistency_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 84.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 5044,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T09:38:50+00:00",
        "end": "2026-10-28T11:02:54+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 243m, avg 248m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 84 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 243m, avg 248m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 09:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 14 AIS positions
  • Period: 2026-10-28T09:44:55+00:00 to 2026-10-28T16:14:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-10-28T09:44:55+00:00",
        "lat": 37.15948329999999799611032358370721340179443359375,
        "lon": -6.89660670000000042278998080291785299777984619140625
    },
    "last_point": {
        "ts": "2026-10-28T16:14:57+00:00",
        "lat": 37.15948499999999654619387001730501651763916015625,
        "lon": -6.8965782999999998281737134675495326519012451171875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 09:14 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 6 meters
  • Data Points: 14 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 390,
    "points": 14,
    "centroid": {
        "lat": 37.15951534999999950059645925648510456085205078125,
        "lon": -6.89660774285714328613039469928480684757232666015625
    },
    "bbox": {
        "min_lat": 37.15948329999999799611032358370721340179443359375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.8965782999999998281737134675495326519012451171875
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 09:05 UTC 65/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 299 meters
  • Average Distance: 299 meters
  • Duration: 42 minutes
  • Period: 2026-10-28T09:05:57+00:00 to 2026-10-28T09:47:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 299m, avg 299m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 299m, avg 299m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T15:45:01.263550+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 299.1000000000000227373675443232059478759765625,
    "avg_distance_m": 299.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.299999999999999988897769753748434595763683319091796875,
    "duration_minutes": 42,
    "overlap_duration_s": 2521,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T09:05:57+00:00",
        "end": "2026-10-28T09:47:58+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 299m, avg 299m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 299m, avg 299m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.16028330000000323707354255020618438720703125,
            "lon": -6.897962899999999564215613645501434803009033203125
        },
        "time_window": {
            "start_ts": "2026-10-28T09:05:57+00:00",
            "end_ts": "2026-10-28T09:47:58+00:00"
        },
        "searched_at": "2026-10-28T15:45:01.263550+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 08:55 UTC 65/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 249 meters
  • Average Distance: 250 meters
  • Duration: 42 minutes
  • Period: 2026-10-28T08:55:44+00:00 to 2026-10-28T09:37:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 249m, avg 250m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 249m, avg 250m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T10:15:09.003653+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 249.400000000000005684341886080801486968994140625,
    "avg_distance_m": 250.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 1.5,
    "duration_minutes": 42,
    "overlap_duration_s": 2520,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T08:55:44+00:00",
        "end": "2026-10-28T09:37:44+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 249m, avg 250m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 249m, avg 250m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.158823699999999234933056868612766265869140625,
            "lon": -6.8954637999999999209421730483882129192352294921875
        },
        "time_window": {
            "start_ts": "2026-10-28T08:55:44+00:00",
            "end_ts": "2026-10-28T09:37:44+00:00"
        },
        "searched_at": "2026-10-28T10:15:09.003653+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 08:02 UTC 70/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 297 meters
  • Average Distance: 298 meters
  • Duration: 54 minutes
  • Period: 2026-10-28T08:53:55+00:00 to 2026-10-28T09:47:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 297m, avg 298m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 297m, avg 298m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 296.69999999999998863131622783839702606201171875,
    "avg_distance_m": 298.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 54,
    "overlap_duration_s": 3243,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T08:53:55+00:00",
        "end": "2026-10-28T09:47:58+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 298m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 297m, avg 298m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 08:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T08:56:50+00:00 to 2026-10-28T15:26:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T08:56:50+00:00",
        "lat": 37.15948999999999813326212461106479167938232421875,
        "lon": -6.89658670000000029176590032875537872314453125
    },
    "last_point": {
        "ts": "2026-10-28T15:26:58+00:00",
        "lat": 37.15950169999999985748218023218214511871337890625,
        "lon": -6.89660670000000042278998080291785299777984619140625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 08:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 6 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 17,
    "centroid": {
        "lat": 37.1595139176470610209435108117759227752685546875,
        "lon": -6.8966074588235297682103919214569032192230224609375
    },
    "bbox": {
        "min_lat": 37.15948329999999799611032358370721340179443359375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.896583299999999638885128661058843135833740234375
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 07:44 UTC 85/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 297 meters
  • Average Distance: 300 meters
  • Duration: 2h 6m
  • Period: 2026-10-28T07:41:57+00:00 to 2026-10-28T09:47:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 297m, avg 300m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 297m, avg 300m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 296.6000000000000227373675443232059478759765625,
    "avg_distance_m": 300.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 4,
    "duration_minutes": 126,
    "overlap_duration_s": 7561,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T07:41:57+00:00",
        "end": "2026-10-28T09:47:58+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 300m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 126 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 297m, avg 300m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 07:44 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 18 AIS positions
  • Period: 2026-10-28T07:50:55+00:00 to 2026-10-28T14:26:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-28T07:50:55+00:00",
        "lat": 37.15948329999999799611032358370721340179443359375,
        "lon": -6.89658169999999959287606543512083590030670166015625
    },
    "last_point": {
        "ts": "2026-10-28T14:26:56+00:00",
        "lat": 37.15953999999999979308995534665882587432861328125,
        "lon": -6.89663170000000036452547647058963775634765625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 07:44 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 7 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 396,
    "points": 18,
    "centroid": {
        "lat": 37.1595102722222208058155956678092479705810546875,
        "lon": -6.896604544444443263273569755256175994873046875
    },
    "bbox": {
        "min_lat": 37.15948329999999799611032358370721340179443359375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 06:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T06:14:51+00:00 to 2026-10-28T12:32:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378.1000000000000227373675443232059478759765625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T06:14:51+00:00",
        "lat": 37.15950670000000144455043482594192028045654296875,
        "lon": -6.896618300000000090221874415874481201171875
    },
    "last_point": {
        "ts": "2026-10-28T12:32:56+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.89660829999999958062062432873062789440155029296875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 06:14 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 8 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "points": 17,
    "centroid": {
        "lat": 37.15950372941176027552501182071864604949951171875,
        "lon": -6.896602547058822807457545422948896884918212890625
    },
    "bbox": {
        "min_lat": 37.15948329999999799611032358370721340179443359375,
        "min_lon": -6.896618300000000090221874415874481201171875,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 05:50 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T05:50:52+00:00 to 2026-10-28T12:14:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T05:50:52+00:00",
        "lat": 37.1594817000000006146365194581449031829833984375,
        "lon": -6.89658830000000033777496355469338595867156982421875
    },
    "last_point": {
        "ts": "2026-10-28T12:14:51+00:00",
        "lat": 37.15950169999999985748218023218214511871337890625,
        "lon": -6.89661499999999971777242535608820617198944091796875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 05:50 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 8 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 384,
    "points": 17,
    "centroid": {
        "lat": 37.15950216470587719186369213275611400604248046875,
        "lon": -6.89660137058823519140560165396891534328460693359375
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.896618300000000090221874415874481201171875,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 04:26 UTC 75/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9335147 (KRITI CAPTAIN) Liberia
  • Minimum Distance: 292 meters
  • Average Distance: 297 meters
  • Duration: 1h 23m
  • Period: 2026-10-28T04:26:57+00:00 to 2026-10-28T05:50:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 292m, avg 297m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 292m, avg 297m
Duration15/25Duration 84 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T10:00:02.123309+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "min_distance_m": 291.8999999999999772626324556767940521240234375,
    "avg_distance_m": 297.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 5,
    "duration_minutes": 83.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 5035,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T04:26:57+00:00",
        "end": "2026-10-28T05:50:52+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 292m, avg 297m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 84 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 292m, avg 297m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1603041999999987865521688945591449737548828125,
            "lon": -6.89795829999999998705106918350793421268463134765625
        },
        "time_window": {
            "start_ts": "2026-10-28T04:26:57+00:00",
            "end_ts": "2026-10-28T05:50:52+00:00"
        },
        "searched_at": "2026-10-28T10:00:02.123309+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 04:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 23m
  • Data Points: 17 AIS positions
  • Period: 2026-10-28T04:38:57+00:00 to 2026-10-28T11:02:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 383.8999999999999772626324556767940521240234375,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-28T04:38:57+00:00",
        "lat": 37.1595200000000005502442945726215839385986328125,
        "lon": -6.89659829999999995919779394171200692653656005859375
    },
    "last_point": {
        "ts": "2026-10-28T11:02:54+00:00",
        "lat": 37.15950169999999985748218023218214511871337890625,
        "lon": -6.89661499999999971777242535608820617198944091796875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 04:26 UTC 75.0% ▼
  • Duration: 6h 23m
  • Radius: 7 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 383.8999999999999772626324556767940521240234375,
    "points": 17,
    "centroid": {
        "lat": 37.1595062823529360684915445744991302490234375,
        "lon": -6.8966034294117637415411081747151911258697509765625
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 03:56 UTC 80/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9335147 (KRITI CAPTAIN) Liberia
  • Minimum Distance: 292 meters
  • Average Distance: 298 meters
  • Duration: 1h 54m
  • Period: 2026-10-28T03:56:48+00:00 to 2026-10-28T05:50:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 292m, avg 298m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 292m, avg 298m
Duration20/25Duration 114 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "min_distance_m": 291.8999999999999772626324556767940521240234375,
    "avg_distance_m": 297.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 4.5,
    "duration_minutes": 114.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 6844,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T03:56:48+00:00",
        "end": "2026-10-28T05:50:52+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 292m, avg 298m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 292m, avg 298m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 03:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 18 AIS positions
  • Period: 2026-10-28T03:56:48+00:00 to 2026-10-28T10:26:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390.19999999999998863131622783839702606201171875,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-28T03:56:48+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.8966133000000002795104592223651707172393798828125
    },
    "last_point": {
        "ts": "2026-10-28T10:26:58+00:00",
        "lat": 37.1595717000000007601556717418134212493896484375,
        "lon": -6.89660999999999990706101016257889568805694580078125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 03:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 7 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 390.19999999999998863131622783839702606201171875,
    "points": 18,
    "centroid": {
        "lat": 37.15950667222222136842901818454265594482421875,
        "lon": -6.8966037000000000034560798667371273040771484375
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.1595717000000007601556717418134212493896484375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 02:37 UTC 75/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 242 meters
  • Average Distance: 245 meters
  • Duration: 1h 6m
  • Period: 2026-10-28T02:37:45+00:00 to 2026-10-28T03:43:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 242m, avg 245m) for 66 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 242m, avg 245m
Duration15/25Duration 66 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T08:30:09.631890+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 242.400000000000005684341886080801486968994140625,
    "avg_distance_m": 244.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 66,
    "overlap_duration_s": 3959,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T02:37:45+00:00",
        "end": "2026-10-28T03:43:44+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 242m, avg 245m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 66 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 242m, avg 245m) for 66 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.15884960000000347690729540772736072540283203125,
            "lon": -6.8955020999999998565499481628648936748504638671875
        },
        "time_window": {
            "start_ts": "2026-10-28T02:37:45+00:00",
            "end_ts": "2026-10-28T03:43:44+00:00"
        },
        "searched_at": "2026-10-28T08:30:09.631890+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 02:17 UTC 85/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 292 meters
  • Average Distance: 298 meters
  • Duration: 2h 30m
  • Period: 2026-10-28T02:17:55+00:00 to 2026-10-28T04:47:59+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 292m, avg 298m) for 150 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 292m, avg 298m
Duration25/25Duration 150 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T08:30:07.225662+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 291.8999999999999772626324556767940521240234375,
    "avg_distance_m": 297.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 150.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 9004,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T02:17:55+00:00",
        "end": "2026-10-28T04:47:59+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 292m, avg 298m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 150 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 292m, avg 298m) for 150 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.16030599999999850524545763619244098663330078125,
            "lon": -6.89796630000000021709638531319797039031982421875
        },
        "time_window": {
            "start_ts": "2026-10-28T02:17:55+00:00",
            "end_ts": "2026-10-28T04:47:59+00:00"
        },
        "searched_at": "2026-10-28T08:30:07.225662+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 02:08 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 18 AIS positions
  • Period: 2026-10-28T02:44:53+00:00 to 2026-10-28T09:14:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-28T02:44:53+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.89660670000000042278998080291785299777984619140625
    },
    "last_point": {
        "ts": "2026-10-28T09:14:50+00:00",
        "lat": 37.15949669999999827041392563842236995697021484375,
        "lon": -6.8965949999999995867483448819257318973541259765625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 02:08 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 5 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 18,
    "centroid": {
        "lat": 37.159503894444441129962797276675701141357421875,
        "lon": -6.89660490555555583114255568943917751312255859375
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.15954169999999834317350178025662899017333984375,
        "max_lon": -6.89658169999999959287606543512083590030670166015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 01:56 UTC 85/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 292 meters
  • Average Distance: 299 meters
  • Duration: 2h 54m
  • Period: 2026-10-28T01:53:56+00:00 to 2026-10-28T04:47:59+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 292m, avg 298m) for 174 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 292m, avg 298m
Duration25/25Duration 174 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 291.8999999999999772626324556767940521240234375,
    "avg_distance_m": 298.5,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 174.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10443,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T01:53:56+00:00",
        "end": "2026-10-28T04:47:59+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 292m, avg 298m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 174 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 292m, avg 298m) for 174 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 28, 2026 01:55 UTC 80/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 243 meters
  • Average Distance: 245 meters
  • Duration: 1h 48m
  • Period: 2026-10-28T01:55:44+00:00 to 2026-10-28T03:43:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 243m, avg 245m) for 108 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 243m, avg 245m
Duration20/25Duration 108 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 242.900000000000005684341886080801486968994140625,
    "avg_distance_m": 245.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 108,
    "overlap_duration_s": 6480,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T01:55:44+00:00",
        "end": "2026-10-28T03:43:44+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 243m, avg 245m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 108 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 243m, avg 245m) for 108 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 01:38 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 20 AIS positions
  • Period: 2026-10-28T01:38:51+00:00 to 2026-10-28T08:02:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384.1000000000000227373675443232059478759765625,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-28T01:38:51+00:00",
        "lat": 37.1595032999999972389559843577444553375244140625,
        "lon": -6.89659829999999995919779394171200692653656005859375
    },
    "last_point": {
        "ts": "2026-10-28T08:02:57+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.8965949999999995867483448819257318973541259765625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 01:38 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 5 meters
  • Data Points: 20 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "points": 20,
    "centroid": {
        "lat": 37.1595048349999927950193523429334163665771484375,
        "lon": -6.89660299499999940309180601616390049457550048828125
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.15954169999999834317350178025662899017333984375,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 28, 2026 00:08 UTC 65/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 246 meters
  • Average Distance: 247 meters
  • Duration: 42 minutes
  • Period: 2026-10-28T00:08:51+00:00 to 2026-10-28T00:50:48+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 246m, avg 247m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 246m, avg 247m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T02:00:04.725489+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 245.5,
    "avg_distance_m": 247.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 42,
    "overlap_duration_s": 2517,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-28T00:08:51+00:00",
        "end": "2026-10-28T00:50:48+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 246m, avg 247m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 246m, avg 247m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1588481000000001586158759891986846923828125,
            "lon": -6.895482799999999912188286543823778629302978515625
        },
        "time_window": {
            "start_ts": "2026-10-28T00:08:51+00:00",
            "end_ts": "2026-10-28T00:50:48+00:00"
        },
        "searched_at": "2026-10-28T02:00:04.725489+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 28, 2026 00:08 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 20 AIS positions
  • Period: 2026-10-28T00:08:51+00:00 to 2026-10-28T06:26:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378.1000000000000227373675443232059478759765625,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-28T00:08:51+00:00",
        "lat": 37.15950500000000289446688839234411716461181640625,
        "lon": -6.89659330000000014848637874820269644260406494140625
    },
    "last_point": {
        "ts": "2026-10-28T06:26:56+00:00",
        "lat": 37.1594867000000022017047740519046783447265625,
        "lon": -6.89660829999999958062062432873062789440155029296875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 28, 2026 00:08 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 5 meters
  • Data Points: 20 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "points": 20,
    "centroid": {
        "lat": 37.1595066699999989623393048532307147979736328125,
        "lon": -6.89660357999999984457417667726986110210418701171875
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.15954169999999834317350178025662899017333984375,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 23:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 20 AIS positions
  • Period: 2026-10-27T23:26:52+00:00 to 2026-10-28T05:50:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-27T23:26:52+00:00",
        "lat": 37.1595133000000004130924935452640056610107421875,
        "lon": -6.89660500000000009634959496906958520412445068359375
    },
    "last_point": {
        "ts": "2026-10-28T05:50:52+00:00",
        "lat": 37.1594817000000006146365194581449031829833984375,
        "lon": -6.89658830000000033777496355469338595867156982421875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 23:14 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 5 meters
  • Data Points: 20 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 384,
    "points": 20,
    "centroid": {
        "lat": 37.159508079999994833997334353625774383544921875,
        "lon": -6.89660316499999925810016065952368080615997314453125
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.15954169999999834317350178025662899017333984375,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 22:47 UTC 70/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 296 meters
  • Average Distance: 298 meters
  • Duration: 48 minutes
  • Period: 2026-10-27T22:47:58+00:00 to 2026-10-27T23:35:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 296m, avg 298m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T03:30:08.011901+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 296,
    "avg_distance_m": 297.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 48,
    "overlap_duration_s": 2879,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T22:47:58+00:00",
        "end": "2026-10-27T23:35:57+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 296m, avg 298m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.160306300000002011074684560298919677734375,
            "lon": -6.8979572999999998472731022047810256481170654296875
        },
        "time_window": {
            "start_ts": "2026-10-27T22:47:58+00:00",
            "end_ts": "2026-10-27T23:35:57+00:00"
        },
        "searched_at": "2026-10-28T03:30:08.011901+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 22:43 UTC 65/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 243 meters
  • Average Distance: 244 meters
  • Duration: 36 minutes
  • Period: 2026-10-27T22:43:44+00:00 to 2026-10-27T23:19:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 243m, avg 244m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 243m, avg 244m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T03:30:10.427822+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 242.599999999999994315658113919198513031005859375,
    "avg_distance_m": 244.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 36,
    "overlap_duration_s": 2160,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T22:43:44+00:00",
        "end": "2026-10-27T23:19:44+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 243m, avg 244m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 243m, avg 244m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1588378000000005840774974785745143890380859375,
            "lon": -6.89550109999999971677198118413798511028289794921875
        },
        "time_window": {
            "start_ts": "2026-10-27T22:43:44+00:00",
            "end_ts": "2026-10-27T23:19:44+00:00"
        },
        "searched_at": "2026-10-28T03:30:10.427822+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 22:32 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 23 AIS positions
  • Period: 2026-10-27T22:32:52+00:00 to 2026-10-28T04:50:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378.1000000000000227373675443232059478759765625,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-27T22:32:52+00:00",
        "lat": 37.15952329999999648180164513178169727325439453125,
        "lon": -6.8966133000000002795104592223651707172393798828125
    },
    "last_point": {
        "ts": "2026-10-28T04:50:57+00:00",
        "lat": 37.15954169999999834317350178025662899017333984375,
        "lon": -6.8966367000000001752368916640989482402801513671875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 22:32 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 5 meters
  • Data Points: 23 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "points": 23,
    "centroid": {
        "lat": 37.15950933913043030543121858499944210052490234375,
        "lon": -6.8966042739130433147920484771020710468292236328125
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.8966367000000001752368916640989482402801513671875,
        "max_lat": 37.15954169999999834317350178025662899017333984375,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 21:56 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 22 AIS positions
  • Period: 2026-10-27T21:56:55+00:00 to 2026-10-28T04:26:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-27T21:56:55+00:00",
        "lat": 37.15953499999999820602170075289905071258544921875,
        "lon": -6.8966016999999997239001459092833101749420166015625
    },
    "last_point": {
        "ts": "2026-10-28T04:26:57+00:00",
        "lat": 37.15950670000000144455043482594192028045654296875,
        "lon": -6.89660999999999990706101016257889568805694580078125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 21:56 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 22 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 390,
    "points": 22,
    "centroid": {
        "lat": 37.15950854999999108940755832009017467498779296875,
        "lon": -6.89660295454545479998387236264534294605255126953125
    },
    "bbox": {
        "min_lat": 37.1594817000000006146365194581449031829833984375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15953499999999820602170075289905071258544921875,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 21:49 UTC 80/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 241 meters
  • Average Distance: 244 meters
  • Duration: 1h 30m
  • Period: 2026-10-27T21:49:44+00:00 to 2026-10-27T23:19:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 241m, avg 244m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 241m, avg 244m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 240.80000000000001136868377216160297393798828125,
    "avg_distance_m": 243.5,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 90,
    "overlap_duration_s": 5400,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T21:49:44+00:00",
        "end": "2026-10-27T23:19:44+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 241m, avg 244m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 241m, avg 244m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 20:53 UTC 85/100 ▼
Vessel A: IMO 9335147 (KRITI CAPTAIN) Liberia
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 296 meters
  • Average Distance: 298 meters
  • Duration: 2h 42m
  • Period: 2026-10-27T20:53:58+00:00 to 2026-10-27T23:35:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 296m, avg 298m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 296,
    "avg_distance_m": 298.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 162,
    "overlap_duration_s": 9719,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T20:53:58+00:00",
        "end": "2026-10-27T23:35:57+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 296m, avg 298m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 162 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KRITI CAPTAIN and STI COMANDANTE) maintained close proximity (min 296m, avg 298m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 20:02 UTC 80/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 241 meters
  • Average Distance: 244 meters
  • Duration: 1h 54m
  • Period: 2026-10-27T20:02:51+00:00 to 2026-10-27T21:56:55+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 241m, avg 244m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 241m, avg 244m
Duration20/25Duration 114 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 240.80000000000001136868377216160297393798828125,
    "avg_distance_m": 243.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 114.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 6844,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T20:02:51+00:00",
        "end": "2026-10-27T21:56:55+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 241m, avg 244m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 241m, avg 244m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 20:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 18 AIS positions
  • Period: 2026-10-27T20:44:52+00:00 to 2026-10-28T03:02:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378.1000000000000227373675443232059478759765625,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-27T20:44:52+00:00",
        "lat": 37.15951830000000200016074813902378082275390625,
        "lon": -6.89657169999999997145323504810221493244171142578125
    },
    "last_point": {
        "ts": "2026-10-28T03:02:56+00:00",
        "lat": 37.1595133000000004130924935452640056610107421875,
        "lon": -6.89659330000000014848637874820269644260406494140625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 20:02 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 3 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "points": 18,
    "centroid": {
        "lat": 37.159509983333322225007577799260616302490234375,
        "lon": -6.8965987944444453461301236529834568500518798828125
    },
    "bbox": {
        "min_lat": 37.15948999999999813326212461106479167938232421875,
        "min_lon": -6.896618300000000090221874415874481201171875,
        "max_lat": 37.15953499999999820602170075289905071258544921875,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 19:20 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 18 AIS positions
  • Period: 2026-10-27T19:32:48+00:00 to 2026-10-28T02:08:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-27T19:32:48+00:00",
        "lat": 37.15949669999999827041392563842236995697021484375,
        "lon": -6.896596699999999913188730715773999691009521484375
    },
    "last_point": {
        "ts": "2026-10-28T02:08:52+00:00",
        "lat": 37.15950670000000144455043482594192028045654296875,
        "lon": -6.89659330000000014848637874820269644260406494140625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 19:20 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 18,
    "centroid": {
        "lat": 37.15951072777778563249739818274974822998046875,
        "lon": -6.8966003777777782346447565942071378231048583984375
    },
    "bbox": {
        "min_lat": 37.15948999999999813326212461106479167938232421875,
        "min_lon": -6.89661670000000004421281118993647396564483642578125,
        "max_lat": 37.15953499999999820602170075289905071258544921875,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 19:13 UTC 70/100 ▼
Vessel A: IMO 9261762 (CHEM GUARD) Singapore
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 244 meters
  • Average Distance: 245 meters
  • Duration: 48 minutes
  • Period: 2026-10-27T19:13:44+00:00 to 2026-10-27T20:01:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 244m, avg 245m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 244m, avg 245m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-27T20:30:02.044608+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 244.400000000000005684341886080801486968994140625,
    "avg_distance_m": 244.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 0.200000000000000011102230246251565404236316680908203125,
    "duration_minutes": 48,
    "overlap_duration_s": 2880,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T19:13:44+00:00",
        "end": "2026-10-27T20:01:44+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 244m, avg 245m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM GUARD and STI COMANDANTE) maintained close proximity (min 244m, avg 245m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.15886619999999851415850571356713771820068359375,
            "lon": -6.89551249999999971151964928139932453632354736328125
        },
        "time_window": {
            "start_ts": "2026-10-27T19:13:44+00:00",
            "end_ts": "2026-10-27T20:01:44+00:00"
        },
        "searched_at": "2026-10-27T20:30:02.044608+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 18:26 UTC 75/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9335147 (KRITI CAPTAIN) Liberia
  • Minimum Distance: 294 meters
  • Average Distance: 297 meters
  • Duration: 1h 18m
  • Period: 2026-10-27T18:26:49+00:00 to 2026-10-27T19:44:50+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 294m, avg 297m) for 78 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 294m, avg 297m
Duration15/25Duration 78 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-27T21:15:01.707272+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "min_distance_m": 294.30000000000001136868377216160297393798828125,
    "avg_distance_m": 297,
    "distance_consistency_m": 2.5,
    "duration_minutes": 78,
    "overlap_duration_s": 4681,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T18:26:49+00:00",
        "end": "2026-10-27T19:44:50+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 294m, avg 297m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 78 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 294m, avg 297m) for 78 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.16030479999999869278326514177024364471435546875,
            "lon": -6.89795189999999980301481627975590527057647705078125
        },
        "time_window": {
            "start_ts": "2026-10-27T18:26:49+00:00",
            "end_ts": "2026-10-27T19:44:50+00:00"
        },
        "searched_at": "2026-10-27T21:15:01.707272+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 18:26 UTC 70/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 245 meters
  • Average Distance: 246 meters
  • Duration: 54 minutes
  • Period: 2026-10-27T18:26:49+00:00 to 2026-10-27T19:20:50+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 245m, avg 246m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 245m, avg 246m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-28T00:15:05.681485+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 244.69999999999998863131622783839702606201171875,
    "avg_distance_m": 245.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 54,
    "overlap_duration_s": 3241,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T18:26:49+00:00",
        "end": "2026-10-27T19:20:50+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 245m, avg 246m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 245m, avg 246m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.158855799999997771010384894907474517822265625,
            "lon": -6.8955000000000001847411112976260483264923095703125
        },
        "time_window": {
            "start_ts": "2026-10-27T18:26:49+00:00",
            "end_ts": "2026-10-27T19:20:50+00:00"
        },
        "searched_at": "2026-10-28T00:15:05.681485+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 18:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 17 AIS positions
  • Period: 2026-10-27T18:26:49+00:00 to 2026-10-28T00:50:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-27T18:26:49+00:00",
        "lat": 37.15952829999999806886989972554147243499755859375,
        "lon": -6.896583299999999638885128661058843135833740234375
    },
    "last_point": {
        "ts": "2026-10-28T00:50:48+00:00",
        "lat": 37.1595200000000005502442945726215839385986328125,
        "lon": -6.8966016999999997239001459092833101749420166015625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 18:26 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 3 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 384,
    "points": 17,
    "centroid": {
        "lat": 37.15951439411764312126251752488315105438232421875,
        "lon": -6.89660255882353023793029933585785329341888427734375
    },
    "bbox": {
        "min_lat": 37.15948999999999813326212461106479167938232421875,
        "min_lon": -6.89661670000000004421281118993647396564483642578125,
        "max_lat": 37.15953499999999820602170075289905071258544921875,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 17:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 16 AIS positions
  • Period: 2026-10-27T17:32:51+00:00 to 2026-10-28T00:08:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-27T17:32:51+00:00",
        "lat": 37.1595650000000006230038707144558429718017578125,
        "lon": -6.89658670000000029176590032875537872314453125
    },
    "last_point": {
        "ts": "2026-10-28T00:08:51+00:00",
        "lat": 37.15950500000000289446688839234411716461181640625,
        "lon": -6.89659330000000014848637874820269644260406494140625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 17:14 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 16 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5,
    "duration_minutes": 396,
    "points": 16,
    "centroid": {
        "lat": 37.1595172749999989036950864829123020172119140625,
        "lon": -6.8966016750000012081045497325249016284942626953125
    },
    "bbox": {
        "min_lat": 37.15948999999999813326212461106479167938232421875,
        "min_lon": -6.89661670000000004421281118993647396564483642578125,
        "max_lat": 37.1595650000000006230038707144558429718017578125,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 17:07 UTC 85/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 244 meters
  • Average Distance: 246 meters
  • Duration: 2h 6m
  • Period: 2026-10-27T17:14:50+00:00 to 2026-10-27T19:20:50+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 244m, avg 246m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 244m, avg 246m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 244.30000000000001136868377216160297393798828125,
    "avg_distance_m": 246.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 126,
    "overlap_duration_s": 7560,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T17:14:50+00:00",
        "end": "2026-10-27T19:20:50+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 244m, avg 246m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 126 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 244m, avg 246m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 15:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 12 AIS positions
  • Period: 2026-10-27T15:20:48+00:00 to 2026-10-27T21:56:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-10-27T15:20:48+00:00",
        "lat": 37.1596100000000006957634468562901020050048828125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    },
    "last_point": {
        "ts": "2026-10-27T21:56:55+00:00",
        "lat": 37.15953499999999820602170075289905071258544921875,
        "lon": -6.8966016999999997239001459092833101749420166015625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 15:14 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 11 meters
  • Data Points: 12 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.5,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 12,
    "centroid": {
        "lat": 37.15954610000000002401066012680530548095703125,
        "lon": -6.896603358333333488872085581533610820770263671875
    },
    "bbox": {
        "min_lat": 37.15949669999999827041392563842236995697021484375,
        "min_lon": -6.89662169999999985492422638344578444957733154296875,
        "max_lat": 37.15964000000000311274561681784689426422119140625,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 14:14 UTC 60/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9335147 (KRITI CAPTAIN) Liberia
  • Minimum Distance: 269 meters
  • Average Distance: 318 meters
  • Duration: 1h 6m
  • Period: 2026-10-27T14:14:51+00:00 to 2026-10-27T15:20:48+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 269m, avg 318m) for 66 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). Moderate distance variation observed during the encounter. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 269m, avg 318m
Duration15/25Duration 66 minutes
Speed Stability12/20both very slow; somewhat variable speeds
Distance Consistency8/15Distance variance ±61m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-27T15:45:01.702761+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636021691,
        "imo": 9335147,
        "name": "KRITI CAPTAIN",
        "flag": "Liberia"
    },
    "min_distance_m": 269.30000000000001136868377216160297393798828125,
    "avg_distance_m": 318.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 61.10000000000000142108547152020037174224853515625,
    "duration_minutes": 66,
    "overlap_duration_s": 3957,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.520000000000000017763568394002504646778106689453125,
    "speed_b_std": 0.67000000000000003996802888650563545525074005126953125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.520000000000000017763568394002504646778106689453125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        }
    },
    "time_window": {
        "start": "2026-10-27T14:14:51+00:00",
        "end": "2026-10-27T15:20:48+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 269m, avg 318m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 66 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b161m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and KRITI CAPTAIN) maintained close proximity (min 269m, avg 318m) for 66 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). Moderate distance variation observed during the encounter. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.15989979999999803794707986526191234588623046875,
            "lon": -6.89816289999999998627799868700094521045684814453125
        },
        "time_window": {
            "start_ts": "2026-10-27T14:14:51+00:00",
            "end_ts": "2026-10-27T15:20:48+00:00"
        },
        "searched_at": "2026-10-27T15:45:01.702761+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 14:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 14 AIS positions
  • Period: 2026-10-27T14:14:51+00:00 to 2026-10-27T20:44:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-10-27T14:14:51+00:00",
        "lat": 37.15953999999999979308995534665882587432861328125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    },
    "last_point": {
        "ts": "2026-10-27T20:44:52+00:00",
        "lat": 37.15951830000000200016074813902378082275390625,
        "lon": -6.89657169999999997145323504810221493244171142578125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 14:14 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 10 meters
  • Data Points: 14 AIS positions
  • Centroid: 37.1596, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10,
    "duration_minutes": 390,
    "points": 14,
    "centroid": {
        "lat": 37.15955022857142608927460969425737857818603515625,
        "lon": -6.89660752142857091939731617458164691925048828125
    },
    "bbox": {
        "min_lat": 37.15949669999999827041392563842236995697021484375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15964000000000311274561681784689426422119140625,
        "max_lon": -6.89657169999999997145323504810221493244171142578125
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 13:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 12 AIS positions
  • Period: 2026-10-27T13:02:48+00:00 to 2026-10-27T19:32:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-10-27T13:02:48+00:00",
        "lat": 37.15957329999999814162947586737573146820068359375,
        "lon": -6.89657330000000001746229827404022216796875
    },
    "last_point": {
        "ts": "2026-10-27T19:32:48+00:00",
        "lat": 37.15949669999999827041392563842236995697021484375,
        "lon": -6.896596699999999913188730715773999691009521484375
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 13:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 8 meters
  • Data Points: 12 AIS positions
  • Centroid: 37.1596, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.300000000000000710542735760100185871124267578125,
    "duration_minutes": 390,
    "points": 12,
    "centroid": {
        "lat": 37.15956624166665989150715176947414875030517578125,
        "lon": -6.89660320833333262413589181960560381412506103515625
    },
    "bbox": {
        "min_lat": 37.15949669999999827041392563842236995697021484375,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15964000000000311274561681784689426422119140625,
        "max_lon": -6.89656670000000016074181985459290444850921630859375
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 12:08 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 13 AIS positions
  • Period: 2026-10-27T12:08:47+00:00 to 2026-10-27T18:26:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-10-27T12:08:47+00:00",
        "lat": 37.15953830000000124300640891306102275848388671875,
        "lon": -6.89662669999999966563564157695509493350982666015625
    },
    "last_point": {
        "ts": "2026-10-27T18:26:49+00:00",
        "lat": 37.15952829999999806886989972554147243499755859375,
        "lon": -6.896583299999999638885128661058843135833740234375
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 12:08 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 9 meters
  • Data Points: 13 AIS positions
  • Centroid: 37.1596, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.699999999999999289457264239899814128875732421875,
    "duration_minutes": 378,
    "points": 13,
    "centroid": {
        "lat": 37.15956255384615047887564287520945072174072265625,
        "lon": -6.89660679999999981504288371070288121700286865234375
    },
    "bbox": {
        "min_lat": 37.15948999999999813326212461106479167938232421875,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15964000000000311274561681784689426422119140625,
        "max_lon": -6.89656670000000016074181985459290444850921630859375
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 12:01 UTC 65/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 249 meters
  • Average Distance: 250 meters
  • Duration: 36 minutes
  • Period: 2026-10-27T12:08:47+00:00 to 2026-10-27T12:44:49+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 249m, avg 250m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 249m, avg 250m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 248.599999999999994315658113919198513031005859375,
    "avg_distance_m": 249.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 36,
    "overlap_duration_s": 2162,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T12:08:47+00:00",
        "end": "2026-10-27T12:44:49+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 249m, avg 250m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 249m, avg 250m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Southern Öresund Surveillance Zone
Oct 27, 2026 11:08 UTC 80/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 240 meters
  • Average Distance: 246 meters
  • Duration: 1h 36m
  • Period: 2026-10-27T11:08:45+00:00 to 2026-10-27T12:44:49+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 246m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 240m, avg 246m
Duration20/25Duration 96 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-27T17:15:02.135879+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 239.69999999999998863131622783839702606201171875,
    "avg_distance_m": 246.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 96.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 5764,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T11:08:45+00:00",
        "end": "2026-10-27T12:44:49+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 240m, avg 246m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 96 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 246m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1588445000000007212292985059320926666259765625,
            "lon": -6.8954892000000000962245394475758075714111328125
        },
        "time_window": {
            "start_ts": "2026-10-27T11:08:45+00:00",
            "end_ts": "2026-10-27T12:44:49+00:00"
        },
        "searched_at": "2026-10-27T17:15:02.135879+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 11:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 15 AIS positions
  • Period: 2026-10-27T11:02:46+00:00 to 2026-10-27T17:32:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-10-27T11:02:46+00:00",
        "lat": 37.15949830000000275731508736498653888702392578125,
        "lon": -6.89661499999999971777242535608820617198944091796875
    },
    "last_point": {
        "ts": "2026-10-27T17:32:51+00:00",
        "lat": 37.1595650000000006230038707144558429718017578125,
        "lon": -6.89658670000000029176590032875537872314453125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 11:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 10 meters
  • Data Points: 15 AIS positions
  • Centroid: 37.1596, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 15,
    "centroid": {
        "lat": 37.1595501000000041358362068422138690948486328125,
        "lon": -6.89660545333333185880064775119535624980926513671875
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15964000000000311274561681784689426422119140625,
        "max_lon": -6.89656670000000016074181985459290444850921630859375
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 10:08 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 5h 11m
  • Data Points: 15 AIS positions
  • Period: 2026-10-27T10:08:51+00:00 to 2026-10-27T15:20:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 311.8999999999999772626324556767940521240234375,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-10-27T10:08:51+00:00",
        "lat": 37.15952829999999806886989972554147243499755859375,
        "lon": -6.8965566999999996511405697674490511417388916015625
    },
    "last_point": {
        "ts": "2026-10-27T15:20:48+00:00",
        "lat": 37.1596100000000006957634468562901020050048828125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 10:08 UTC 75.0% ▼
  • Duration: 5h 11m
  • Radius: 9 meters
  • Data Points: 15 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.800000000000000710542735760100185871124267578125,
    "duration_minutes": 311.8999999999999772626324556767940521240234375,
    "points": 15,
    "centroid": {
        "lat": 37.159532880000000432119122706353664398193359375,
        "lon": -6.8966007866666654280152215505950152873992919921875
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1596100000000006957634468562901020050048828125,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 10:00 UTC 85/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 240 meters
  • Average Distance: 246 meters
  • Duration: 2h 17m
  • Period: 2026-10-27T10:26:52+00:00 to 2026-10-27T12:44:49+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 246m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 240m, avg 246m
Duration25/25Duration 138 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 239.69999999999998863131622783839702606201171875,
    "avg_distance_m": 245.5,
    "distance_consistency_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 137.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 8277,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T10:26:52+00:00",
        "end": "2026-10-27T12:44:49+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 240m, avg 246m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 138 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 246m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 09:44 UTC 79/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9261762 (CHEM GUARD) Singapore
  • Minimum Distance: 240 meters
  • Average Distance: 256 meters
  • Duration: 3 hours
  • Period: 2026-10-27T09:44:46+00:00 to 2026-10-27T12:44:49+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 79/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 256m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 240m, avg 256m
Duration25/25Duration 180 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency12/15Distance variance ±36m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 563105200,
        "imo": 9261762,
        "name": "CHEM GUARD",
        "flag": "Singapore"
    },
    "min_distance_m": 239.69999999999998863131622783839702606201171875,
    "avg_distance_m": 256.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 35.5,
    "duration_minutes": 180.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10803,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.34999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-10-27T09:44:46+00:00",
        "end": "2026-10-27T12:44:49+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 79,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 240m, avg 256m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 180 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b136m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and CHEM GUARD) maintained close proximity (min 240m, avg 256m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 09:32 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 5h 48m
  • Data Points: 17 AIS positions
  • Period: 2026-10-27T09:32:47+00:00 to 2026-10-27T15:20:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 348,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-27T09:32:47+00:00",
        "lat": 37.1595166999999975132595864124596118927001953125,
        "lon": -6.8966133000000002795104592223651707172393798828125
    },
    "last_point": {
        "ts": "2026-10-27T15:20:48+00:00",
        "lat": 37.1596100000000006957634468562901020050048828125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 09:32 UTC 75.0% ▼
  • Duration: 5h 48m
  • Radius: 9 meters
  • Data Points: 17 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 348,
    "points": 17,
    "centroid": {
        "lat": 37.15953009411764895730811986140906810760498046875,
        "lon": -6.89660098823529299494339284137822687625885009765625
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1596100000000006957634468562901020050048828125,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 08:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 18 AIS positions
  • Period: 2026-10-27T08:50:46+00:00 to 2026-10-27T15:20:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-27T08:50:46+00:00",
        "lat": 37.15951170000000303161868941970169544219970703125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    },
    "last_point": {
        "ts": "2026-10-27T15:20:48+00:00",
        "lat": 37.1596100000000006957634468562901020050048828125,
        "lon": -6.89662169999999985492422638344578444957733154296875
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 08:26 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 9 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 390,
    "points": 18,
    "centroid": {
        "lat": 37.159529072222227341626421548426151275634765625,
        "lon": -6.89660213888888851130332113825716078281402587890625
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.1596100000000006957634468562901020050048828125,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 07:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 18 AIS positions
  • Period: 2026-10-27T07:56:45+00:00 to 2026-10-27T14:20:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-27T07:56:45+00:00",
        "lat": 37.1595200000000005502442945726215839385986328125,
        "lon": -6.89660829999999958062062432873062789440155029296875
    },
    "last_point": {
        "ts": "2026-10-27T14:20:45+00:00",
        "lat": 37.15954169999999834317350178025662899017333984375,
        "lon": -6.89663170000000036452547647058963775634765625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 07:26 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 8 meters
  • Data Points: 18 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.5,
    "duration_minutes": 384,
    "points": 18,
    "centroid": {
        "lat": 37.159517777777779201642260886728763580322265625,
        "lon": -6.89660065555555501504159110481850802898406982421875
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89663170000000036452547647058963775634765625,
        "max_lat": 37.15957999999999827878127689473330974578857421875,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 06:08 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 20 AIS positions
  • Period: 2026-10-27T06:38:47+00:00 to 2026-10-27T13:08:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-27T06:38:47+00:00",
        "lat": 37.1595099999999973761077853851020336151123046875,
        "lon": -6.89661499999999971777242535608820617198944091796875
    },
    "last_point": {
        "ts": "2026-10-27T13:08:45+00:00",
        "lat": 37.15957999999999827878127689473330974578857421875,
        "lon": -6.89656670000000016074181985459290444850921630859375
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 06:08 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 8 meters
  • Data Points: 20 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8,
    "duration_minutes": 390,
    "points": 20,
    "centroid": {
        "lat": 37.15951341499999927009412203915417194366455078125,
        "lon": -6.89659983499999906797484072740189731121063232421875
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89662669999999966563564157695509493350982666015625,
        "max_lat": 37.15957999999999827878127689473330974578857421875,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 05:02 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 21 AIS positions
  • Period: 2026-10-27T05:02:43+00:00 to 2026-10-27T11:20:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 378.1000000000000227373675443232059478759765625,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-27T05:02:43+00:00",
        "lat": 37.159508299999998826024238951504230499267578125,
        "lon": -6.8966016999999997239001459092833101749420166015625
    },
    "last_point": {
        "ts": "2026-10-27T11:20:47+00:00",
        "lat": 37.159463299999998753264662809669971466064453125,
        "lon": -6.89657169999999997145323504810221493244171142578125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 05:02 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 5 meters
  • Data Points: 21 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "points": 21,
    "centroid": {
        "lat": 37.1595041333333284683249075897037982940673828125,
        "lon": -6.896601276190477136651679757051169872283935546875
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89662669999999966563564157695509493350982666015625,
        "max_lat": 37.15952999999999661895344615913927555084228515625,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 04:39 UTC 80/100 ▼
Vessel A: IMO 9747106 (LIAN XI HU) HONG KONG
Vessel B: IMO 9686857 (STI COMANDANTE) Marshall Is
  • Minimum Distance: 288 meters
  • Average Distance: 290 meters
  • Duration: 1h 30m
  • Period: 2026-10-27T04:39:49+00:00 to 2026-10-27T06:09:49+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (LIAN XI HU and STI COMANDANTE) maintained close proximity (min 288m, avg 290m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 288m, avg 290m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477021600,
        "imo": 9747106,
        "name": "LIAN XI HU",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "min_distance_m": 287.6000000000000227373675443232059478759765625,
    "avg_distance_m": 289.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 90,
    "overlap_duration_s": 5400,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T04:39:49+00:00",
        "end": "2026-10-27T06:09:49+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 288m, avg 290m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (LIAN XI HU and STI COMANDANTE) maintained close proximity (min 288m, avg 290m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 04:26 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 22 AIS positions
  • Period: 2026-10-27T04:56:47+00:00 to 2026-10-27T11:20:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-27T04:56:47+00:00",
        "lat": 37.1595317000000022744643501937389373779296875,
        "lon": -6.8965849999999999653255144949071109294891357421875
    },
    "last_point": {
        "ts": "2026-10-27T11:20:47+00:00",
        "lat": 37.159463299999998753264662809669971466064453125,
        "lon": -6.89657169999999997145323504810221493244171142578125
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 04:26 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 5 meters
  • Data Points: 22 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 384,
    "points": 22,
    "centroid": {
        "lat": 37.159505386363633760993252508342266082763671875,
        "lon": -6.89660053636363645779283615411259233951568603515625
    },
    "bbox": {
        "min_lat": 37.159463299999998753264662809669971466064453125,
        "min_lon": -6.89662669999999966563564157695509493350982666015625,
        "max_lat": 37.1595317000000022744643501937389373779296875,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 03:20 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 22 AIS positions
  • Period: 2026-10-27T03:38:47+00:00 to 2026-10-27T10:08:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-27T03:38:47+00:00",
        "lat": 37.15950169999999985748218023218214511871337890625,
        "lon": -6.89660829999999958062062432873062789440155029296875
    },
    "last_point": {
        "ts": "2026-10-27T10:08:51+00:00",
        "lat": 37.15952829999999806886989972554147243499755859375,
        "lon": -6.8965566999999996511405697674490511417388916015625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 03:20 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 5 meters
  • Data Points: 22 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 22,
    "centroid": {
        "lat": 37.15950940454546724822648684494197368621826171875,
        "lon": -6.89660364090909094869630280300043523311614990234375
    },
    "bbox": {
        "min_lat": 37.15948329999999799611032358370721340179443359375,
        "min_lon": -6.89662669999999966563564157695509493350982666015625,
        "max_lat": 37.15953329999999965593815431930124759674072265625,
        "max_lon": -6.8965566999999996511405697674490511417388916015625
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Zone Dwell Southern Öresund Surveillance Zone
Oct 27, 2026 01:14 UTC 80.0% ▼
  • Zone: Southern Öresund Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 21 AIS positions
  • Period: 2026-10-27T01:56:42+00:00 to 2026-10-27T08:26:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-27T01:56:42+00:00",
        "lat": 37.1595133000000004130924935452640056610107421875,
        "lon": -6.89660670000000042278998080291785299777984619140625
    },
    "last_point": {
        "ts": "2026-10-27T08:26:48+00:00",
        "lat": 37.15948999999999813326212461106479167938232421875,
        "lon": -6.89660000000000028563817977556027472019195556640625
    }
}
Methodology: 2026.01.18
Loiter Southern Öresund Surveillance Zone
Oct 27, 2026 01:14 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 21 AIS positions
  • Centroid: 37.1595, -6.8966
  • Zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.5,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 21,
    "centroid": {
        "lat": 37.15950556190475850826260284520685672760009765625,
        "lon": -6.89660635238095220955756303737871348857879638671875
    },
    "bbox": {
        "min_lat": 37.159476699999999027568264864385128021240234375,
        "min_lon": -6.89662669999999966563564157695509493350982666015625,
        "max_lat": 37.15953329999999965593815431930124759674072265625,
        "max_lon": -6.8965782999999998281737134675495326519012451171875
    },
    "zone_id": "discovered_003"
}
Methodology: 2026.01.18
Sts Southern Öresund Surveillance Zone
Oct 27, 2026 00:45 UTC 65/100 ▼
Vessel A: IMO 9686857 (STI COMANDANTE) Marshall Is
Vessel B: IMO 9747106 (LIAN XI HU) HONG KONG
  • Minimum Distance: 287 meters
  • Average Distance: 290 meters
  • Duration: 36 minutes
  • Period: 2026-10-27T00:50:49+00:00 to 2026-10-27T01:26:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Southern Öresund Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and LIAN XI HU) maintained close proximity (min 287m, avg 290m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern Öresund Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 287m, avg 290m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Southern Öresund Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005397,
        "imo": 9686857,
        "name": "STI COMANDANTE",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 477021600,
        "imo": 9747106,
        "name": "LIAN XI HU",
        "flag": "HONG KONG"
    },
    "min_distance_m": 287.30000000000001136868377216160297393798828125,
    "avg_distance_m": 289.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 36,
    "overlap_duration_s": 2157,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-27T00:50:49+00:00",
        "end": "2026-10-27T01:26:46+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_003",
    "zone_name": "Southern \u00d6resund Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 287m, avg 290m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Southern \u00d6resund Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (STI COMANDANTE and LIAN XI HU) maintained close proximity (min 287m, avg 290m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Southern \u00d6resund Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Oct 28 18:56 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 18:20 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 17:56 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 17:44 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 17:20 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 16:38 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 16:32 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 16:27 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 16:14 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 15:44 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 15:26 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 14:56 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 14:26 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 14:20 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 13:56 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 13:44 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 12:32 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 12:14 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 11:44 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone
Oct 28 11:02 37.1595 -6.8966 0.0 kn 167.7° Southern Öresund Surveillance Zone

Showing 20 of 100 recent positions.

Data Source

Vessel observed through FleetLeaks' AIS monitoring system in zones of interest. Identity and position data derived from AIS broadcasts and public maritime databases.

Disclaimer: AIS data can be spoofed or falsified. Vessel identities should be independently verified before making compliance decisions.