SUNGJIN ACE

Vessel information

Vessel Name SUNGJIN ACE
MMSI 440156960
Vessel Type Tanker
Flag 🏳️ REPUBLIC OF KOREA
Call Sign SSD
Length 29 m
Beam 7 m

Detected Events (47)

Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 30, 2026 10:01 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1 hours
  • Data Points: 7 AIS positions
  • Period: 2026-07-30T10:01:18+00:00 to 2026-07-30T11:01:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 60.7000000000000028421709430404007434844970703125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-07-30T10:01:18+00:00",
        "lat": 35.02078329999999795063558849506080150604248046875,
        "lon": 129.04644999999999299689079634845256805419921875
    },
    "last_point": {
        "ts": "2026-07-30T11:01:59+00:00",
        "lat": 35.0249000000000023646862246096134185791015625,
        "lon": 129.0434500000000070940586738288402557373046875
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 30, 2026 09:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 56m
  • Data Points: 16 AIS positions
  • Period: 2026-07-30T09:05:57+00:00 to 2026-07-30T11:01:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 116,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-07-30T09:05:57+00:00",
        "lat": 35.021715000000000372892827726900577545166015625,
        "lon": 129.047081700000006776463123969733715057373046875
    },
    "last_point": {
        "ts": "2026-07-30T11:01:59+00:00",
        "lat": 35.0249000000000023646862246096134185791015625,
        "lon": 129.0434500000000070940586738288402557373046875
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 30, 2026 09:05 UTC 75.0% ▼
  • Duration: 1h 56m
  • Radius: 480 meters
  • Data Points: 16 AIS positions
  • Centroid: 35.0213, 129.0464
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 479.8999999999999772626324556767940521240234375,
    "duration_minutes": 116,
    "points": 16,
    "centroid": {
        "lat": 35.02132031250000210320649784989655017852783203125,
        "lon": 129.04640262499998470957507379353046417236328125
    },
    "bbox": {
        "min_lat": 35.02033329999999722303982707671821117401123046875,
        "min_lon": 129.0434500000000070940586738288402557373046875,
        "max_lat": 35.0249000000000023646862246096134185791015625,
        "max_lon": 129.04716669999999112405930645763874053955078125
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 30, 2026 09:00 UTC 85/100 ▼
Vessel A: IMO 9929211 (KUK DONG 1 HO) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 51 meters
  • Average Distance: 66 meters
  • Duration: 1h 11m
  • Period: 2026-07-30T09:00:43+00:00 to 2026-07-30T10:11:43+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (KUK DONG 1 HO and SUNGJIN ACE) maintained close proximity (min 51m, avg 66m) for 71 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 66m
Duration15/25Duration 71 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-30T15:30:06.683532+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440136380,
        "imo": 9929211,
        "name": "KUK DONG 1 HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 50.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 66.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 13.300000000000000710542735760100185871124267578125,
    "duration_minutes": 71,
    "overlap_duration_s": 4260,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.25,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.2200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-30T09:00:43+00:00",
        "end": "2026-07-30T10:11:43+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 66m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 71 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KUK DONG 1 HO and SUNGJIN ACE) maintained close proximity (min 51m, avg 66m) for 71 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0213011000000022931999410502612590789794921875,
            "lon": 129.04709550000001172520569525659084320068359375
        },
        "time_window": {
            "start_ts": "2026-07-30T09:00:43+00:00",
            "end_ts": "2026-07-30T10:11:43+00:00"
        },
        "searched_at": "2026-07-30T15:30:06.683532+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 30, 2026 08:56 UTC 85/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9929211 (KUK DONG 1 HO) REPUBLIC OF KOREA
  • Minimum Distance: 49 meters
  • Average Distance: 69 meters
  • Duration: 1h 11m
  • Period: 2026-07-30T08:56:58+00:00 to 2026-07-30T10:07:58+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SUNGJIN ACE and KUK DONG 1 HO) maintained close proximity (min 48m, avg 69m) for 71 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 48m, avg 69m
Duration15/25Duration 71 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440136380,
        "imo": 9929211,
        "name": "KUK DONG 1 HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 48.5,
    "avg_distance_m": 69,
    "distance_consistency_m": 19.60000000000000142108547152020037174224853515625,
    "duration_minutes": 71,
    "overlap_duration_s": 4260,
    "speed_a_avg": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_a_std": 0.2600000000000000088817841970012523233890533447265625,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2099999999999999922284388276239042170345783233642578125,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-30T08:56:58+00:00",
        "end": "2026-07-30T10:07:58+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 48m, avg 69m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 71 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b120m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SUNGJIN ACE and KUK DONG 1 HO) maintained close proximity (min 48m, avg 69m) for 71 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 30, 2026 08:42 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 19m
  • Data Points: 19 AIS positions
  • Period: 2026-07-30T08:42:58+00:00 to 2026-07-30T11:01:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 139,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-30T08:42:58+00:00",
        "lat": 35.0248332999999973935700836591422557830810546875,
        "lon": 129.043733300000013741737348027527332305908203125
    },
    "last_point": {
        "ts": "2026-07-30T11:01:59+00:00",
        "lat": 35.0249000000000023646862246096134185791015625,
        "lon": 129.0434500000000070940586738288402557373046875
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 30, 2026 08:42 UTC 75.0% ▼
  • Duration: 2h 19m
  • Radius: 459 meters
  • Data Points: 19 AIS positions
  • Centroid: 35.0215, 129.0463
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 459.19999999999998863131622783839702606201171875,
    "duration_minutes": 139,
    "points": 19,
    "centroid": {
        "lat": 35.02150561052631161373938084580004215240478515625,
        "lon": 129.04632852105265783393406309187412261962890625
    },
    "bbox": {
        "min_lat": 35.02033329999999722303982707671821117401123046875,
        "min_lon": 129.0434500000000070940586738288402557373046875,
        "max_lat": 35.0249000000000023646862246096134185791015625,
        "max_lon": 129.04716669999999112405930645763874053955078125
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Ais Gap🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 30, 2026 02:46 UTC 70.0% ▼
  • Gap Duration: 5h 56m
  • Last Seen: 2026-07-30T02:46:24+00:00 at 35.0278, 129.0738 (Zone: Strait of Gibraltar Surveillance Zone)
  • Next Seen: 2026-07-30T08:42:58+00:00 at 35.0248, 129.0437

🛰️ Gap Corroboration

✗ No Imagery

These are snapshots that may corroborate presence during the gap. They do not reconstruct a continuous route.

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-07-30T09:00:04.352860+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 356.6000000000000227373675443232059478759765625,
    "last_seen": {
        "ts": "2026-07-30T02:46:24+00:00",
        "lat": 35.0278167000000024700057110749185085296630859375,
        "lon": 129.07381670000000895015546120703220367431640625,
        "sog": 3.399999999999999911182158029987476766109466552734375,
        "zone_id": "discovered_001"
    },
    "next_seen": {
        "ts": "2026-07-30T08:42:58+00:00",
        "lat": 35.0248332999999973935700836591422557830810546875,
        "lon": 129.043733300000013741737348027527332305908203125,
        "zone_ids": [
            "discovered_001"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 35.0278167000000024700057110749185085296630859375,
                "lon": 129.07381670000000895015546120703220367431640625,
                "ts": "2026-07-30T02:46:24+00:00"
            },
            "end": {
                "lat": 35.0248332999999973935700836591422557830810546875,
                "lon": 129.043733300000013741737348027527332305908203125,
                "ts": "2026-07-30T08:42:58+00:00"
            },
            "bbox": {
                "min_lat": 34.84465300000000098634700407274067401885986328125,
                "min_lon": 128.823702999999994744939613156020641326904296875,
                "max_lat": 35.20799699999999887722879066132009029388427734375,
                "max_lon": 129.293846999999999525243765674531459808349609375
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-07-30T09:00:04.352860+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 30, 2026 02:12 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 7 AIS positions
  • Period: 2026-07-30T02:40:15+00:00 to 2026-07-30T09:07:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 387.69999999999998863131622783839702606201171875,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-07-30T02:40:15+00:00",
        "lat": 35.02836500000000086174622992984950542449951171875,
        "lon": 129.0723166999999875770299695432186126708984375
    },
    "last_point": {
        "ts": "2026-07-30T09:07:57+00:00",
        "lat": 35.02173169999999657875378034077584743499755859375,
        "lon": 129.04716669999999112405930645763874053955078125
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 30, 2026 01:33 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 12m
  • Data Points: 14 AIS positions
  • Period: 2026-07-30T01:33:54+00:00 to 2026-07-30T02:46:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 72.5,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-07-30T01:33:54+00:00",
        "lat": 35.02721669999999676292645744979381561279296875,
        "lon": 129.07283330000001342341420240700244903564453125
    },
    "last_point": {
        "ts": "2026-07-30T02:46:24+00:00",
        "lat": 35.0278167000000024700057110749185085296630859375,
        "lon": 129.07381670000000895015546120703220367431640625
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 29, 2026 07:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 10m
  • Data Points: 17 AIS positions
  • Period: 2026-07-29T07:05:00+00:00 to 2026-07-29T08:15:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 70.400000000000005684341886080801486968994140625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-29T07:05:00+00:00",
        "lat": 35.00835000000000007958078640513122081756591796875,
        "lon": 129.06433329999998704806785099208354949951171875
    },
    "last_point": {
        "ts": "2026-07-29T08:15:22+00:00",
        "lat": 35.0268166999999976951585267670452594757080078125,
        "lon": 129.053316700000010541771189309656620025634765625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 29, 2026 06:23 UTC 75.0% ▼
  • Duration: 1h 44m
  • Radius: 1,952 meters
  • Data Points: 25 AIS positions
  • Centroid: 35.0095, 129.0631
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1952.299999999999954525264911353588104248046875,
    "duration_minutes": 104,
    "points": 25,
    "centroid": {
        "lat": 35.009450208000004067798727191984653472900390625,
        "lon": 129.06305133600000090154935605823993682861328125
    },
    "bbox": {
        "min_lat": 35.00673330000000049722075345925986766815185546875,
        "min_lon": 129.056950000000000500222085975110530853271484375,
        "max_lat": 35.02631670000000241316229221411049365997314453125,
        "max_lon": 129.064400000000006230038707144558429718017578125
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 29, 2026 06:23 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 51m
  • Data Points: 27 AIS positions
  • Period: 2026-07-29T06:23:30+00:00 to 2026-07-29T08:15:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 111.900000000000005684341886080801486968994140625,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-07-29T06:23:30+00:00",
        "lat": 35.02631670000000241316229221411049365997314453125,
        "lon": 129.056950000000000500222085975110530853271484375
    },
    "last_point": {
        "ts": "2026-07-29T08:15:22+00:00",
        "lat": 35.0268166999999976951585267670452594757080078125,
        "lon": 129.053316700000010541771189309656620025634765625
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 28, 2026 04:25 UTC 74/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: MMSI 440316150 (HAE WON) REPUBLIC OF KOREA
  • Minimum Distance: 39 meters
  • Average Distance: 52 meters
  • Duration: 52 minutes
  • Period: 2026-07-28T04:25:47+00:00 to 2026-07-28T05:17:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 74/100

Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and HAE WON) maintained close proximity (min 39m, avg 52m) for 52 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 39m, avg 52m
Duration10/25Duration 52 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440316150,
        "name": "HAE WON",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 39.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 52.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 13.300000000000000710542735760100185871124267578125,
    "duration_minutes": 52.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3130,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_b_std": 0.57999999999999996003197111349436454474925994873046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-28T04:25:47+00:00",
        "end": "2026-07-28T05:17:57+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 74,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 39m, avg 52m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 52 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and HAE WON) maintained close proximity (min 39m, avg 52m) for 52 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️? Strait of Gibraltar Surveillance Zone
Jul 28, 2026 04:10 UTC 85/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9468815 (ROMANCE) PANAMA
  • Minimum Distance: 4 meters
  • Average Distance: 21 meters
  • Duration: 1h 7m
  • Period: 2026-07-28T04:10:16+00:00 to 2026-07-28T05:17:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SUNGJIN ACE and ROMANCE) maintained close proximity (min 4m, avg 21m) for 68 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 Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 21m
Duration15/25Duration 68 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260727T212357_20260727T212418_008734_0114F4_B45C_COG • Acquired: 2026-07-27T21:23:57.276763Z • Platform: sentinel-1c
SAR satellite preview for event 1038467

Click image to view full size

Searched: 2026-07-28T10:30:02.193182+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 352005202,
        "imo": 9468815,
        "name": "ROMANCE",
        "flag": "PANAMA"
    },
    "min_distance_m": 4.20000000000000017763568394002504646778106689453125,
    "avg_distance_m": 21.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 8.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 67.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4061,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-28T04:10:16+00:00",
        "end": "2026-07-28T05:17:57+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 21m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 68 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SUNGJIN ACE and ROMANCE) maintained close proximity (min 4m, avg 21m) for 68 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 Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 35.0113357999999976755134412087500095367431640625,
            "lon": 129.05162400000000388899934478104114532470703125
        },
        "time_window": {
            "start_ts": "2026-07-28T04:10:16+00:00",
            "end_ts": "2026-07-28T05:17:57+00:00"
        },
        "searched_at": "2026-07-28T10:30:02.193182+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260727T212357_20260727T212418_008734_0114F4_B45C_COG",
        "scene_datetime": "2026-07-27T21:23:57.276763Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 127.672920000000004847606760449707508087158203125,
            "min_lat": 33.980052999999998064595274627208709716796875,
            "max_lon": 130.773605000000003428795025683939456939697265625,
            "max_lat": 35.6949350000000009686118573881685733795166015625
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_1038467_thumbnail_20260728103032.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_1038467_thumbnail_20260728103032.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 28, 2026 04:00 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2 hours
  • Data Points: 32 AIS positions
  • Period: 2026-07-28T04:00:37+00:00 to 2026-07-28T06:00:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 120.2999999999999971578290569595992565155029296875,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-07-28T04:00:37+00:00",
        "lat": 35.01109999999999899955582804977893829345703125,
        "lon": 129.05166669999999840001692064106464385986328125
    },
    "last_point": {
        "ts": "2026-07-28T06:00:57+00:00",
        "lat": 35.02749829999999775509422761388123035430908203125,
        "lon": 129.0495333000000073297997005283832550048828125
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 28, 2026 03:44 UTC 75.0% ▼
  • Duration: 1h 36m
  • Radius: 356 meters
  • Data Points: 27 AIS positions
  • Centroid: 35.0113, 129.0515
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 355.5,
    "duration_minutes": 96.7000000000000028421709430404007434844970703125,
    "points": 27,
    "centroid": {
        "lat": 35.01130085925925783385537215508520603179931640625,
        "lon": 129.051482088888889165900764055550098419189453125
    },
    "bbox": {
        "min_lat": 35.00996500000000111185727291740477085113525390625,
        "min_lon": 129.04896669999999403444235213100910186767578125,
        "max_lat": 35.0141832999999991216100170277059078216552734375,
        "max_lon": 129.05318330000000059953890740871429443359375
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 28, 2026 03:35 UTC 74/100 ▼
Vessel A: IMO 9468815 (ROMANCE) PANAMA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 13 meters
  • Average Distance: 72 meters
  • Duration: 1h 49m
  • Period: 2026-07-28T03:35:40+00:00 to 2026-07-28T05:24:51+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 74/100

Moderate-confidence STS candidate. Two tankers (ROMANCE and SUNGJIN ACE) maintained close proximity (min 13m, avg 72m) for 109 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 13m, avg 72m
Duration20/25Duration 109 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency5/15Distance variance ±109m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005202,
        "imo": 9468815,
        "name": "ROMANCE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 13,
    "avg_distance_m": 72.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 109.099999999999994315658113919198513031005859375,
    "duration_minutes": 109.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 6551,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.289999999999999980015985556747182272374629974365234375,
    "speed_b_std": 0.66000000000000003108624468950438313186168670654296875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.289999999999999980015985556747182272374629974365234375,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-07-28T03:35:40+00:00",
        "end": "2026-07-28T05:24:51+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 74,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 72m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 109 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 5,
                "max": 15,
                "detail": "Distance variance \u00b1109m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ROMANCE and SUNGJIN ACE) maintained close proximity (min 13m, avg 72m) for 109 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 28, 2026 03:30 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 30m
  • Data Points: 39 AIS positions
  • Period: 2026-07-28T03:30:55+00:00 to 2026-07-28T06:00:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 150,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-07-28T03:30:55+00:00",
        "lat": 35.0303832999999968933479976840317249298095703125,
        "lon": 129.050783300000006192931323312222957611083984375
    },
    "last_point": {
        "ts": "2026-07-28T06:00:57+00:00",
        "lat": 35.02749829999999775509422761388123035430908203125,
        "lon": 129.0495333000000073297997005283832550048828125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 28, 2026 01:03 UTC 80/100 ▼
Vessel A: MMSI 440707950 (SANLOUIS) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 48 meters
  • Average Distance: 56 meters
  • Duration: 49 minutes
  • Period: 2026-07-28T01:03:13+00:00 to 2026-07-28T01:52:28+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 56m) for 49 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 48m, avg 56m
Duration10/25Duration 49 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-28T07:45:02.020749+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440707950,
        "name": "SANLOUIS",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 47.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 55.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 9.800000000000000710542735760100185871124267578125,
    "duration_minutes": 49.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 2955,
    "speed_a_avg": 0.190000000000000002220446049250313080847263336181640625,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.190000000000000002220446049250313080847263336181640625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-28T01:03:13+00:00",
        "end": "2026-07-28T01:52:28+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 48m, avg 56m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 49 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 56m) for 49 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.01038989999999984092937665991485118865966796875,
            "lon": 129.066105399999997871418599970638751983642578125
        },
        "time_window": {
            "start_ts": "2026-07-28T01:03:13+00:00",
            "end_ts": "2026-07-28T01:52:28+00:00"
        },
        "searched_at": "2026-07-28T07:45:02.020749+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 28, 2026 01:02 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 4h 58m
  • Data Points: 52 AIS positions
  • Period: 2026-07-28T01:02:06+00:00 to 2026-07-28T06:00:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 298.8999999999999772626324556767940521240234375,
    "points_in_zone": 52,
    "first_point": {
        "ts": "2026-07-28T01:02:06+00:00",
        "lat": 35.01044999999999873807610129006206989288330078125,
        "lon": 129.0663667000000032203388400375843048095703125
    },
    "last_point": {
        "ts": "2026-07-28T06:00:57+00:00",
        "lat": 35.02749829999999775509422761388123035430908203125,
        "lon": 129.0495333000000073297997005283832550048828125
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 28, 2026 00:43 UTC 72/100 ▼
Vessel A: MMSI 440707950 (SANLOUIS) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 48 meters
  • Average Distance: 83 meters
  • Duration: 1h 8m
  • Period: 2026-07-28T00:43:40+00:00 to 2026-07-28T01:52:28+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 83m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 48m, avg 83m
Duration15/25Duration 69 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency8/15Distance variance ±87m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440707950,
        "name": "SANLOUIS",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 47.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 83.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 87,
    "duration_minutes": 68.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 4128,
    "speed_a_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.58999999999999996891375531049561686813831329345703125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-07-28T00:43:40+00:00",
        "end": "2026-07-28T01:52:28+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 48m, avg 83m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 69 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b187m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 83m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 28, 2026 00:31 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 29m
  • Data Points: 63 AIS positions
  • Period: 2026-07-28T00:31:27+00:00 to 2026-07-28T06:00:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 329.5,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-07-28T00:31:27+00:00",
        "lat": 35.0290150000000011232259566895663738250732421875,
        "lon": 129.03989830000000438303686678409576416015625
    },
    "last_point": {
        "ts": "2026-07-28T06:00:57+00:00",
        "lat": 35.02749829999999775509422761388123035430908203125,
        "lon": 129.0495333000000073297997005283832550048828125
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 27, 2026 02:04 UTC 78/100 ▼
Vessel A: IMO 9881134 (JS SUN) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 43 meters
  • Average Distance: 84 meters
  • Duration: 1h 21m
  • Period: 2026-07-27T02:04:09+00:00 to 2026-07-27T03:25:21+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 78/100

Moderate-confidence STS candidate. Two tankers (JS SUN and SUNGJIN ACE) maintained close proximity (min 43m, avg 84m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 43m, avg 84m
Duration15/25Duration 81 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency8/15Distance variance ±62m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440326060,
        "imo": 9881134,
        "name": "JS SUN",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 43.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 83.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 61.60000000000000142108547152020037174224853515625,
    "duration_minutes": 81.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4872,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.25,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-27T02:04:09+00:00",
        "end": "2026-07-27T03:25:21+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 78,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 43m, avg 84m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b162m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (JS SUN and SUNGJIN ACE) maintained close proximity (min 43m, avg 84m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 27, 2026 02:02 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 24m
  • Data Points: 19 AIS positions
  • Period: 2026-07-27T02:02:05+00:00 to 2026-07-27T03:26:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 84.2999999999999971578290569595992565155029296875,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-27T02:02:05+00:00",
        "lat": 35.00963329999999729125192970968782901763916015625,
        "lon": 129.065333299999991822915035299956798553466796875
    },
    "last_point": {
        "ts": "2026-07-27T03:26:26+00:00",
        "lat": 35.026898299999999153442331589758396148681640625,
        "lon": 129.05590000000000827640178613364696502685546875
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 27, 2026 01:54 UTC 72/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9881134 (JS SUN) REPUBLIC OF KOREA
  • Minimum Distance: 46 meters
  • Average Distance: 138 meters
  • Duration: 1h 22m
  • Period: 2026-07-27T01:54:26+00:00 to 2026-07-27T03:16:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and JS SUN) maintained close proximity (min 46m, avg 138m) for 82 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 46m, avg 138m
Duration15/25Duration 82 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency5/15Distance variance ±107m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-27T05:00:02.104448+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440326060,
        "imo": 9881134,
        "name": "JS SUN",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 46.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 137.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 107.2999999999999971578290569595992565155029296875,
    "duration_minutes": 82.5,
    "overlap_duration_s": 4951,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.340000000000000024424906541753443889319896697998046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-27T01:54:26+00:00",
        "end": "2026-07-27T03:16:57+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 46m, avg 138m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 82 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 5,
                "max": 15,
                "detail": "Distance variance \u00b1107m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and JS SUN) maintained close proximity (min 46m, avg 138m) for 82 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.009251100000000178624759428203105926513671875,
            "lon": 129.064739400000007663038559257984161376953125
        },
        "time_window": {
            "start_ts": "2026-07-27T01:54:26+00:00",
            "end_ts": "2026-07-27T03:16:57+00:00"
        },
        "searched_at": "2026-07-27T05:00:02.104448+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 27, 2026 01:18 UTC 75.0% ▼
  • Duration: 2h 4m
  • Radius: 1,060 meters
  • Data Points: 30 AIS positions
  • Centroid: 35.0101, 129.0650
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1059.700000000000045474735088646411895751953125,
    "duration_minutes": 124.400000000000005684341886080801486968994140625,
    "points": 30,
    "centroid": {
        "lat": 35.0100922766666684537995024584233760833740234375,
        "lon": 129.065011109999971949946484528481960296630859375
    },
    "bbox": {
        "min_lat": 35.00925000000000153477230924181640148162841796875,
        "min_lon": 129.059966699999989714342518709599971771240234375,
        "max_lat": 35.0188167000000021289451979100704193115234375,
        "max_lon": 129.06608330000000250947778113186359405517578125
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 27, 2026 01:10 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 16m
  • Data Points: 35 AIS positions
  • Period: 2026-07-27T01:10:05+00:00 to 2026-07-27T03:26:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 136.30000000000001136868377216160297393798828125,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-27T01:10:05+00:00",
        "lat": 35.0295167000000020607330952771008014678955078125,
        "lon": 129.039798300000001063381205312907695770263671875
    },
    "last_point": {
        "ts": "2026-07-27T03:26:26+00:00",
        "lat": 35.026898299999999153442331589758396148681640625,
        "lon": 129.05590000000000827640178613364696502685546875
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 24, 2026 05:04 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1 hours
  • Data Points: 20 AIS positions
  • Period: 2026-07-24T05:04:37+00:00 to 2026-07-24T06:05:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 60.5,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-07-24T05:04:37+00:00",
        "lat": 35.00763169999999746551111456938087940216064453125,
        "lon": 129.065983299999999189822119660675525665283203125
    },
    "last_point": {
        "ts": "2026-07-24T06:05:08+00:00",
        "lat": 35.03004829999999714118530391715466976165771484375,
        "lon": 129.058116699999999354986357502639293670654296875
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 24, 2026 04:31 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 33m
  • Data Points: 28 AIS positions
  • Period: 2026-07-24T04:31:49+00:00 to 2026-07-24T06:05:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 93.2999999999999971578290569595992565155029296875,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-07-24T04:31:49+00:00",
        "lat": 35.02649999999999863575794734060764312744140625,
        "lon": 129.057216699999997899794834665954113006591796875
    },
    "last_point": {
        "ts": "2026-07-24T06:05:08+00:00",
        "lat": 35.03004829999999714118530391715466976165771484375,
        "lon": 129.058116699999999354986357502639293670654296875
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 18, 2026 23:23 UTC 82/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9281176 (WOOWONHO) REPUBLIC OF KOREA
  • Minimum Distance: 39 meters
  • Average Distance: 65 meters
  • Duration: 1h 17m
  • Period: 2026-07-18T23:24:17+00:00 to 2026-07-19T00:41:18+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SUNGJIN ACE and WOOWONHO) maintained close proximity (min 38m, avg 65m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 38m, avg 65m
Duration15/25Duration 77 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440400900,
        "imo": 9281176,
        "name": "WOOWONHO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 38.5,
    "avg_distance_m": 65.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 10.5,
    "duration_minutes": 77,
    "overlap_duration_s": 4621,
    "speed_a_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_a_std": 0.460000000000000019984014443252817727625370025634765625,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-18T23:24:17+00:00",
        "end": "2026-07-19T00:41:18+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 38m, avg 65m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 77 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SUNGJIN ACE and WOOWONHO) maintained close proximity (min 38m, avg 65m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 18, 2026 23:21 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 19m
  • Data Points: 11 AIS positions
  • Period: 2026-07-18T23:21:38+00:00 to 2026-07-19T00:41:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 79.7000000000000028421709430404007434844970703125,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-07-18T23:21:38+00:00",
        "lat": 35.02834829999999755045791971497237682342529296875,
        "lon": 129.068299999999993588062352500855922698974609375
    },
    "last_point": {
        "ts": "2026-07-19T00:41:18+00:00",
        "lat": 35.02890000000000014779288903810083866119384765625,
        "lon": 129.069783300000011649899533949792385101318359375
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 17, 2026 00:04 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 20m
  • Data Points: 20 AIS positions
  • Period: 2026-07-17T00:04:15+00:00 to 2026-07-17T01:24:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 80.7000000000000028421709430404007434844970703125,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-07-17T00:04:15+00:00",
        "lat": 35.01291669999999811579982633702456951141357421875,
        "lon": 129.051233300000006920527084730565547943115234375
    },
    "last_point": {
        "ts": "2026-07-17T01:24:57+00:00",
        "lat": 35.02758330000000341897248290479183197021484375,
        "lon": 129.04595000000000482032191939651966094970703125
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 23:36 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 48m
  • Data Points: 24 AIS positions
  • Period: 2026-07-16T23:36:16+00:00 to 2026-07-17T01:24:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 108.7000000000000028421709430404007434844970703125,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-07-16T23:36:16+00:00",
        "lat": 35.02384829999999737992766313254833221435546875,
        "lon": 129.046798300000006065602065064013004302978515625
    },
    "last_point": {
        "ts": "2026-07-17T01:24:57+00:00",
        "lat": 35.02758330000000341897248290479183197021484375,
        "lon": 129.04595000000000482032191939651966094970703125
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 23:36 UTC 75.0% ▼
  • Duration: 1h 35m
  • Radius: 1,232 meters
  • Data Points: 23 AIS positions
  • Centroid: 35.0134, 129.0514
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1231.799999999999954525264911353588104248046875,
    "duration_minutes": 95.7000000000000028421709430404007434844970703125,
    "points": 23,
    "centroid": {
        "lat": 35.0134082478260921789114945568144321441650390625,
        "lon": 129.051393404347805926590808667242527008056640625
    },
    "bbox": {
        "min_lat": 35.0120332999999988032868714071810245513916015625,
        "min_lon": 129.046798300000006065602065064013004302978515625,
        "max_lat": 35.02384829999999737992766313254833221435546875,
        "max_lon": 129.0526833000000124229700304567813873291015625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 03:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 2m
  • Data Points: 13 AIS positions
  • Period: 2026-07-16T03:05:09+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 62,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-07-16T03:05:09+00:00",
        "lat": 35.029283300000003009699867106974124908447265625,
        "lon": 129.0736666999999897598172537982463836669921875
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:01 UTC 72/100 ▼
Vessel A: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 54 meters
  • Average Distance: 60 meters
  • Duration: 30 minutes
  • Period: 2026-07-16T02:01:33+00:00 to 2026-07-16T02:31:53+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (KUKDONG3HO and SUNGJIN ACE) maintained close proximity (min 54m, avg 60m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 60m
Duration5/25Duration 30 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T08:45:12.149112+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 54.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 60.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 30.300000000000000710542735760100185871124267578125,
    "overlap_duration_s": 1820,
    "speed_a_avg": 0.440000000000000002220446049250313080847263336181640625,
    "speed_a_std": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.440000000000000002220446049250313080847263336181640625,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-16T02:01:33+00:00",
        "end": "2026-07-16T02:31:53+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 60m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KUKDONG3HO and SUNGJIN ACE) maintained close proximity (min 54m, avg 60m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02952959999999649198798579163849353790283203125,
            "lon": 129.07322149999998828207026235759258270263671875
        },
        "time_window": {
            "start_ts": "2026-07-16T02:01:33+00:00",
            "end_ts": "2026-07-16T02:31:53+00:00"
        },
        "searched_at": "2026-07-16T08:45:12.149112+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:00 UTC 80/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 48 meters
  • Average Distance: 54 meters
  • Duration: 51 minutes
  • Period: 2026-07-16T02:00:37+00:00 to 2026-07-16T02:51:48+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (BUKWANG and SUNGJIN ACE) maintained close proximity (min 48m, avg 54m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 48m, avg 54m
Duration10/25Duration 51 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T08:45:09.756229+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 47.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 53.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 51.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3071,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-16T02:00:37+00:00",
        "end": "2026-07-16T02:51:48+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 48m, avg 54m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and SUNGJIN ACE) maintained close proximity (min 48m, avg 54m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02942879999999803430910105817019939422607421875,
            "lon": 129.07330719999998791536199860274791717529296875
        },
        "time_window": {
            "start_ts": "2026-07-16T02:00:37+00:00",
            "end_ts": "2026-07-16T02:51:48+00:00"
        },
        "searched_at": "2026-07-16T08:45:09.756229+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:00 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 7m
  • Data Points: 26 AIS positions
  • Period: 2026-07-16T02:00:08+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 127,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-16T02:00:08+00:00",
        "lat": 35.0294999999999987494447850622236728668212890625,
        "lon": 129.073499999999995679900166578590869903564453125
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:00 UTC 75.0% ▼
  • Duration: 2h 7m
  • Radius: 41 meters
  • Data Points: 26 AIS positions
  • Centroid: 35.0293, 129.0737
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 41.10000000000000142108547152020037174224853515625,
    "duration_minutes": 127,
    "points": 26,
    "centroid": {
        "lat": 35.02928410000000525315044797025620937347412109375,
        "lon": 129.07366551153842237908975221216678619384765625
    },
    "bbox": {
        "min_lat": 35.0289982999999978119376464746892452239990234375,
        "min_lon": 129.073399999999992360244505107402801513671875,
        "max_lat": 35.0295832999999987578121363185346126556396484375,
        "max_lon": 129.073883300000005647234502248466014862060546875
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:22 UTC 79/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 55 meters
  • Average Distance: 66 meters
  • Duration: 1h 11m
  • Period: 2026-07-16T01:27:48+00:00 to 2026-07-16T02:39:29+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 79/100

Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and KUKDONG3HO) maintained close proximity (min 55m, avg 66m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 55m, avg 66m
Duration15/25Duration 72 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency15/15Distance variance ±14m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 55.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 65.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 14.5,
    "duration_minutes": 71.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4301,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.5300000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.4899999999999999911182158029987476766109466552734375,
    "speed_b_std": 0.479999999999999982236431605997495353221893310546875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.4899999999999999911182158029987476766109466552734375,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-16T01:27:48+00:00",
        "end": "2026-07-16T02:39:29+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 79,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 55m, avg 66m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and KUKDONG3HO) maintained close proximity (min 55m, avg 66m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:21 UTC 75.0% ▼
  • Duration: 2h 45m
  • Radius: 693 meters
  • Data Points: 37 AIS positions
  • Centroid: 35.0294, 129.0733
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 693.299999999999954525264911353588104248046875,
    "duration_minutes": 165.400000000000005684341886080801486968994140625,
    "points": 37,
    "centroid": {
        "lat": 35.0293522027026966725316015072166919708251953125,
        "lon": 129.07330941621620468140463344752788543701171875
    },
    "bbox": {
        "min_lat": 35.0289982999999978119376464746892452239990234375,
        "min_lon": 129.065766700000011724114301614463329315185546875,
        "max_lat": 35.03009829999999880101313465274870395660400390625,
        "max_lon": 129.073916700000012269811122678220272064208984375
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:21 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 45m
  • Data Points: 37 AIS positions
  • Period: 2026-07-16T01:21:48+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 165.400000000000005684341886080801486968994140625,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-07-16T01:21:48+00:00",
        "lat": 35.03009829999999880101313465274870395660400390625,
        "lon": 129.065766700000011724114301614463329315185546875
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:18 UTC 82/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 38 meters
  • Average Distance: 54 meters
  • Duration: 1h 29m
  • Period: 2026-07-16T01:27:48+00:00 to 2026-07-16T02:57:10+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SUNGJIN ACE and BUKWANG) maintained close proximity (min 38m, avg 54m) for 89 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 38m, avg 54m
Duration15/25Duration 89 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±15m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 38.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 54.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 15,
    "duration_minutes": 89.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 5362,
    "speed_a_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_a_std": 0.4899999999999999911182158029987476766109466552734375,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-16T01:27:48+00:00",
        "end": "2026-07-16T02:57:10+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 38m, avg 54m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 89 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b115m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SUNGJIN ACE and BUKWANG) maintained close proximity (min 38m, avg 54m) for 89 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:02 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 4h 5m
  • Data Points: 42 AIS positions
  • Period: 2026-07-16T00:02:06+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 245.099999999999994315658113919198513031005859375,
    "points_in_zone": 42,
    "first_point": {
        "ts": "2026-07-16T00:02:06+00:00",
        "lat": 35.01268329999999906476659816689789295196533203125,
        "lon": 129.06293329999999741630745120346546173095703125
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:03 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 3m
  • Data Points: 43 AIS positions
  • Period: 2026-07-15T23:03:26+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 303.69999999999998863131622783839702606201171875,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-07-15T23:03:26+00:00",
        "lat": 35.0081500000000005456968210637569427490234375,
        "lon": 129.065033300000010285657481290400028228759765625
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:45 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 21m
  • Data Points: 46 AIS positions
  • Period: 2026-07-15T22:45:47+00:00 to 2026-07-16T04:07:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 321.3999999999999772626324556767940521240234375,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-07-15T22:45:47+00:00",
        "lat": 35.024816700000002356318873353302478790283203125,
        "lon": 129.057216699999997899794834665954113006591796875
    },
    "last_point": {
        "ts": "2026-07-16T04:07:10+00:00",
        "lat": 35.02916669999999754736563772894442081451416015625,
        "lon": 129.073700000000002319211489520967006683349609375
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 30 11:01 35.0249 129.0435 9.2 kn 339.2° Strait of Gibraltar Surveillance Zone
Jul 30 10:59 35.0217 129.0459 4.6 kn 304.7° Strait of Gibraltar Surveillance Zone
Jul 30 10:55 35.0203 129.0469 5.2 kn 166.9° Strait of Gibraltar Surveillance Zone
Jul 30 10:07 35.0206 129.0464 0.0 kn 111.7° Strait of Gibraltar Surveillance Zone
Jul 30 10:05 35.0206 129.0464 0.6 kn 221.0° Strait of Gibraltar Surveillance Zone
Jul 30 10:03 35.0207 129.0464 0.2 kn 192.2° Strait of Gibraltar Surveillance Zone
Jul 30 10:01 35.0208 129.0465 0.1 kn 38.0° Strait of Gibraltar Surveillance Zone
Jul 30 09:57 35.0208 129.0465 0.0 kn 188.5° Strait of Gibraltar Surveillance Zone
Jul 30 09:53 35.0209 129.0465 0.2 kn 203.5° Strait of Gibraltar Surveillance Zone
Jul 30 09:47 35.0210 129.0466 0.1 kn 220.8° Strait of Gibraltar Surveillance Zone
Jul 30 09:42 35.0211 129.0466 0.1 kn 213.5° Strait of Gibraltar Surveillance Zone
Jul 30 09:39 35.0212 129.0466 0.0 kn 31.9° Strait of Gibraltar Surveillance Zone
Jul 30 09:29 35.0215 129.0467 0.0 kn 226.7° Strait of Gibraltar Surveillance Zone
Jul 30 09:27 35.0215 129.0467 0.2 kn 194.5° Strait of Gibraltar Surveillance Zone
Jul 30 09:07 35.0217 129.0472 0.4 kn 106.7° Strait of Gibraltar Surveillance Zone
Jul 30 09:05 35.0217 129.0471 0.9 kn 149.7° Strait of Gibraltar Surveillance Zone
Jul 30 08:56 35.0215 129.0469 0.2 kn 65.5° Strait of Gibraltar Surveillance Zone
Jul 30 08:47 35.0211 129.0471 0.7 kn 80.0° Strait of Gibraltar Surveillance Zone
Jul 30 08:42 35.0248 129.0437 8.6 kn 173.6° Strait of Gibraltar Surveillance Zone
Jul 30 02:46 35.0278 129.0738 3.4 kn 102.4° Strait of Gibraltar 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.