GAZ FRATERNITY

IMO 9448487

Vessel information

Vessel Name GAZ FRATERNITY
IMO Number 9448487
MMSI 372668000
Vessel Type Tanker - Hazard D (Recognizable)
Flag 🇵🇦 Panama
Call Sign 3ETS6
Length 154 m
Beam 26 m

Detected Events (100)

Zone Dwell discovered_021
Apr 21, 2026 06:07 UTC 80.0% ▼
  • Zone: discovered_021
  • Duration: 1h 47m
  • Data Points: 27 AIS positions
  • Period: 2026-04-21T06:07:15+00:00 to 2026-04-21T07:54:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_021",
    "zone_name": "Central Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 107.7000000000000028421709430404007434844970703125,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-04-21T06:07:15+00:00",
        "lat": 36.31630830000000287327566184103488922119140625,
        "lon": 14.8085199999999996833821569452993571758270263671875
    },
    "last_point": {
        "ts": "2026-04-21T07:54:55+00:00",
        "lat": 36.34566829999999981737346388399600982666015625,
        "lon": 15.2961167000000006765958460164256393909454345703125
    }
}
Methodology: 2026.01.18
Zone Dwell discovered_021
Apr 21, 2026 05:29 UTC 80.0% ▼
  • Zone: discovered_021
  • Duration: 2h 25m
  • Data Points: 32 AIS positions
  • Period: 2026-04-21T05:29:57+00:00 to 2026-04-21T07:54:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_021",
    "zone_name": "Central Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 145,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-04-21T05:29:57+00:00",
        "lat": 36.32101999999999719648258178494870662689208984375,
        "lon": 14.6386532999999996462747731129638850688934326171875
    },
    "last_point": {
        "ts": "2026-04-21T07:54:55+00:00",
        "lat": 36.34566829999999981737346388399600982666015625,
        "lon": 15.2961167000000006765958460164256393909454345703125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Surveillance Zone
Apr 20, 2026 16:01 UTC 80.0% ▼
  • Zone: Central Mediterranean Surveillance Zone
  • Duration: 1h 11m
  • Data Points: 54 AIS positions
  • Period: 2026-04-20T16:01:07+00:00 to 2026-04-20T17:12:37+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_130",
    "zone_name": "Central Mediterranean Surveillance Zone",
    "dwell_minutes": 71.5,
    "points_in_zone": 54,
    "first_point": {
        "ts": "2026-04-20T16:01:07+00:00",
        "lat": 37.32142999999999943838702165521681308746337890625,
        "lon": 11.290594999999999714646037318743765354156494140625
    },
    "last_point": {
        "ts": "2026-04-20T17:12:37+00:00",
        "lat": 37.20751169999999774518073536455631256103515625,
        "lon": 11.566591700000000031423041946254670619964599609375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Surveillance Zone
Apr 20, 2026 15:08 UTC 80.0% ▼
  • Zone: Central Mediterranean Surveillance Zone
  • Duration: 2h 3m
  • Data Points: 88 AIS positions
  • Period: 2026-04-20T15:08:57+00:00 to 2026-04-20T17:12:37+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_130",
    "zone_name": "Central Mediterranean Surveillance Zone",
    "dwell_minutes": 123.7000000000000028421709430404007434844970703125,
    "points_in_zone": 88,
    "first_point": {
        "ts": "2026-04-20T15:08:57+00:00",
        "lat": 37.41031670000000275422280537895858287811279296875,
        "lon": 11.0896282999999993279516274924390017986297607421875
    },
    "last_point": {
        "ts": "2026-04-20T17:12:37+00:00",
        "lat": 37.20751169999999774518073536455631256103515625,
        "lon": 11.566591700000000031423041946254670619964599609375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Surveillance Zone
Apr 20, 2026 14:42 UTC 80.0% ▼
  • Zone: Central Mediterranean Surveillance Zone
  • Duration: 2h 30m
  • Data Points: 94 AIS positions
  • Period: 2026-04-20T14:42:07+00:00 to 2026-04-20T17:12:37+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_130",
    "zone_name": "Central Mediterranean Surveillance Zone",
    "dwell_minutes": 150.5,
    "points_in_zone": 94,
    "first_point": {
        "ts": "2026-04-20T14:42:07+00:00",
        "lat": 37.431770000000000209183781407773494720458984375,
        "lon": 10.9742683000000003090690370299853384494781494140625
    },
    "last_point": {
        "ts": "2026-04-20T17:12:37+00:00",
        "lat": 37.20751169999999774518073536455631256103515625,
        "lon": 11.566591700000000031423041946254670619964599609375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Apr 20, 2026 14:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 25m
  • Data Points: 41 AIS positions
  • Period: 2026-04-20T14:02:27+00:00 to 2026-04-20T15:27:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_186",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 85.2999999999999971578290569595992565155029296875,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-04-20T14:02:27+00:00",
        "lat": 37.46918000000000148475010064430534839630126953125,
        "lon": 10.8065400000000000346744855050928890705108642578125
    },
    "last_point": {
        "ts": "2026-04-20T15:27:46+00:00",
        "lat": 37.38079830000000214340616366825997829437255859375,
        "lon": 11.163985000000000269437805400229990482330322265625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Apr 20, 2026 13:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 2h 18m
  • Data Points: 76 AIS positions
  • Period: 2026-04-20T13:09:35+00:00 to 2026-04-20T15:27:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_186",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 138.19999999999998863131622783839702606201171875,
    "points_in_zone": 76,
    "first_point": {
        "ts": "2026-04-20T13:09:35+00:00",
        "lat": 37.4922566999999986592229106463491916656494140625,
        "lon": 10.5693283000000004534513209364376962184906005859375
    },
    "last_point": {
        "ts": "2026-04-20T15:27:46+00:00",
        "lat": 37.38079830000000214340616366825997829437255859375,
        "lon": 11.163985000000000269437805400229990482330322265625
    }
}
Methodology: 2026.01.18
Zone Dwell North Sea Monitoring Zone
Apr 8, 2026 15:28 UTC 80.0% ▼
  • Zone: North Sea Monitoring Zone
  • Duration: 1h 52m
  • Data Points: 22 AIS positions
  • Period: 2026-04-08T15:28:10+00:00 to 2026-04-08T17:20:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_122",
    "zone_name": "Mediterranean Sea Surveillance Zone",
    "dwell_minutes": 112.2000000000000028421709430404007434844970703125,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-04-08T15:28:10+00:00",
        "lat": 36.736296699999996917540556751191616058349609375,
        "lon": 0.90554170000000000495532503919093869626522064208984375
    },
    "last_point": {
        "ts": "2026-04-08T17:20:19+00:00",
        "lat": 36.53505169999999679930624552071094512939453125,
        "lon": 0.49247669999999998946549339962075464427471160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Apr 7, 2026 01:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 9m
  • Data Points: 47 AIS positions
  • Period: 2026-04-07T01:09:50+00:00 to 2026-04-07T02:18:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_186",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 69,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-04-07T01:09:50+00:00",
        "lat": 37.51608829999999983328962116502225399017333984375,
        "lon": 10.93945169999999933452272671274840831756591796875
    },
    "last_point": {
        "ts": "2026-04-07T02:18:50+00:00",
        "lat": 37.5906767000000030520823202095925807952880859375,
        "lon": 10.6351216999999991230652085505425930023193359375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Surveillance Zone
Apr 6, 2026 23:07 UTC 80.0% ▼
  • Zone: Central Mediterranean Surveillance Zone
  • Duration: 1 hours
  • Data Points: 26 AIS positions
  • Period: 2026-04-06T23:07:20+00:00 to 2026-04-07T00:07:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_130",
    "zone_name": "Central Mediterranean Surveillance Zone",
    "dwell_minutes": 60,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-04-06T23:07:20+00:00",
        "lat": 37.34396000000000270802047452889382839202880859375,
        "lon": 11.4486132999999998816065271967090666294097900390625
    },
    "last_point": {
        "ts": "2026-04-07T00:07:20+00:00",
        "lat": 37.45264999999999844249032321386039257049560546875,
        "lon": 11.2056816999999995232428773306310176849365234375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Surveillance Zone
Apr 6, 2026 22:37 UTC 80.0% ▼
  • Zone: Central Mediterranean Surveillance Zone
  • Duration: 1h 29m
  • Data Points: 39 AIS positions
  • Period: 2026-04-06T22:37:30+00:00 to 2026-04-07T00:07:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_130",
    "zone_name": "Central Mediterranean Surveillance Zone",
    "dwell_minutes": 89.7999999999999971578290569595992565155029296875,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-04-06T22:37:30+00:00",
        "lat": 37.28961170000000180380084202624857425689697265625,
        "lon": 11.567994999999999805595507496036589145660400390625
    },
    "last_point": {
        "ts": "2026-04-07T00:07:20+00:00",
        "lat": 37.45264999999999844249032321386039257049560546875,
        "lon": 11.2056816999999995232428773306310176849365234375
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 17:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 3h 22m
  • Data Points: 9 AIS positions
  • Period: 2026-03-28T17:02:19+00:00 to 2026-03-28T20:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 202.80000000000001136868377216160297393798828125,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-03-28T17:02:19+00:00",
        "lat": 37.103198300000002518572728149592876434326171875,
        "lon": 23.19078999999999979308995534665882587432861328125
    },
    "last_point": {
        "ts": "2026-03-28T20:25:09+00:00",
        "lat": 37.06596499999999849706000532023608684539794921875,
        "lon": 23.20767670000000038044163375161588191986083984375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 28, 2026 16:02 UTC 73/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 12 meters
  • Average Distance: 54 meters
  • Duration: 1h 17m
  • Period: 2026-03-28T16:02:05+00:00 to 2026-03-28T17:19:25+00:00
  • Vessel A Avg Speed: 0.7 knots
  • Vessel B Avg Speed: 0.6 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 73/100

Moderate-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 12m, avg 54m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.7 and 0.6 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 12m, avg 54m
Duration15/25Duration 77 minutes
Speed Stability15/20both very slow; stable speeds
Distance Consistency8/15Distance variance ±57m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T23:02:11.072634+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 12.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 53.5,
    "distance_consistency_m": 57,
    "duration_minutes": 77.2999999999999971578290569595992565155029296875,
    "overlap_duration_s": 4640,
    "speed_a_avg": 0.66000000000000003108624468950438313186168670654296875,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.58999999999999996891375531049561686813831329345703125,
    "speed_b_std": 0.309999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.66000000000000003108624468950438313186168670654296875,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.58999999999999996891375531049561686813831329345703125,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T16:02:05+00:00",
        "end": "2026-03-28T17:19:25+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 73,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 12m, avg 54m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 77 minutes"
            },
            "speed_stability": {
                "score": 15,
                "max": 20,
                "detail": "both very slow; stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b157m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 12m, avg 54m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.7 and 0.6 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.1022918000000032634488889016211032867431640625,
            "lon": 23.186624699999999421606844407506287097930908203125
        },
        "time_window": {
            "start_ts": "2026-03-28T16:02:05+00:00",
            "end_ts": "2026-03-28T17:19:25+00:00"
        },
        "searched_at": "2026-03-28T23:02:11.072634+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 16:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 4h 24m
  • Data Points: 25 AIS positions
  • Period: 2026-03-28T16:00:18+00:00 to 2026-03-28T20:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 264.8999999999999772626324556767940521240234375,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-03-28T16:00:18+00:00",
        "lat": 37.09998499999999665988070773892104625701904296875,
        "lon": 23.180846700000000026875568437390029430389404296875
    },
    "last_point": {
        "ts": "2026-03-28T20:25:09+00:00",
        "lat": 37.06596499999999849706000532023608684539794921875,
        "lon": 23.20767670000000038044163375161588191986083984375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 28, 2026 15:04 UTC 86/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 53 meters
  • Duration: 2h 15m
  • Period: 2026-03-28T15:04:05+00:00 to 2026-03-28T17:19:25+00:00
  • Vessel A Avg Speed: 0.6 knots
  • Vessel B Avg Speed: 0.6 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 86/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 53m) for 135 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.6 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 53m
Duration25/25Duration 135 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency8/15Distance variance ±54m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T22:02:11.018407+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 53.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 54,
    "duration_minutes": 135.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 8120,
    "speed_a_avg": 0.64000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_b_avg": 0.57999999999999996003197111349436454474925994873046875,
    "speed_b_std": 0.2399999999999999911182158029987476766109466552734375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.64000000000000001332267629550187848508358001708984375,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.57999999999999996003197111349436454474925994873046875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T15:04:05+00:00",
        "end": "2026-03-28T17:19:25+00:00"
    },
    "points_count": {
        "vessel_a": 42,
        "vessel_b": 42
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 86,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 53m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 135 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; very stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b154m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 53m) for 135 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.6 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.0996757999999999810825102031230926513671875,
            "lon": 23.182513400000001269063432118855416774749755859375
        },
        "time_window": {
            "start_ts": "2026-03-28T15:04:05+00:00",
            "end_ts": "2026-03-28T17:19:25+00:00"
        },
        "searched_at": "2026-03-28T22:02:11.018407+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 15:02 UTC 75.0% ▼
  • Duration: 2h 8m
  • Radius: 1,342 meters
  • Data Points: 26 AIS positions
  • Centroid: 37.1007, 23.1838
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1342.299999999999954525264911353588104248046875,
    "duration_minutes": 128.30000000000001136868377216160297393798828125,
    "points": 26,
    "centroid": {
        "lat": 37.1006564076923126549445441924035549163818359375,
        "lon": 23.183780323076920382163734757341444492340087890625
    },
    "bbox": {
        "min_lat": 37.09184499999999928832039586268365383148193359375,
        "min_lon": 23.173436699999999888177626417018473148345947265625,
        "max_lat": 37.10386330000000043582986108958721160888671875,
        "max_lon": 23.19311330000000026529960450716316699981689453125
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 15:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 22m
  • Data Points: 32 AIS positions
  • Period: 2026-03-28T15:02:28+00:00 to 2026-03-28T20:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 322.69999999999998863131622783839702606201171875,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-03-28T15:02:28+00:00",
        "lat": 37.09184499999999928832039586268365383148193359375,
        "lon": 23.173436699999999888177626417018473148345947265625
    },
    "last_point": {
        "ts": "2026-03-28T20:25:09+00:00",
        "lat": 37.06596499999999849706000532023608684539794921875,
        "lon": 23.20767670000000038044163375161588191986083984375
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 14:56 UTC 75.0% ▼
  • Duration: 2h 46m
  • Radius: 1,605 meters
  • Data Points: 34 AIS positions
  • Centroid: 37.0979, 23.1810
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1604.5,
    "duration_minutes": 166.099999999999994315658113919198513031005859375,
    "points": 34,
    "centroid": {
        "lat": 37.0979370117646993776361341588199138641357421875,
        "lon": 23.1810065205882409600235405378043651580810546875
    },
    "bbox": {
        "min_lat": 37.086056700000000319050741381943225860595703125,
        "min_lon": 23.17072170000000141953933052718639373779296875,
        "max_lat": 37.10386330000000043582986108958721160888671875,
        "max_lon": 23.19311330000000026529960450716316699981689453125
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 28, 2026 14:01 UTC 90/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 48 meters
  • Duration: 3h 18m
  • Period: 2026-03-28T14:01:26+00:00 to 2026-03-28T17:19:25+00:00
  • Vessel A Avg Speed: 0.6 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 48m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 48m
Duration25/25Duration 198 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency12/15Distance variance ±47m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T20:47:10.822385+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 48.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 46.7000000000000028421709430404007434844970703125,
    "duration_minutes": 198,
    "overlap_duration_s": 11879,
    "speed_a_avg": 0.59999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0.54000000000000003552713678800500929355621337890625,
    "speed_b_std": 0.200000000000000011102230246251565404236316680908203125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.59999999999999997779553950749686919152736663818359375,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.54000000000000003552713678800500929355621337890625,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T14:01:26+00:00",
        "end": "2026-03-28T17:19:25+00:00"
    },
    "points_count": {
        "vessel_a": 62,
        "vessel_b": 62
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 48m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 198 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; very stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b147m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 48m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.095700800000003027889761142432689666748046875,
            "lon": 23.178923600000000959653334575705230236053466796875
        },
        "time_window": {
            "start_ts": "2026-03-28T14:01:26+00:00",
            "end_ts": "2026-03-28T17:19:25+00:00"
        },
        "searched_at": "2026-03-28T20:47:10.822385+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 14:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 24m
  • Data Points: 44 AIS positions
  • Period: 2026-03-28T14:00:18+00:00 to 2026-03-28T20:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 384.8999999999999772626324556767940521240234375,
    "points_in_zone": 44,
    "first_point": {
        "ts": "2026-03-28T14:00:18+00:00",
        "lat": 37.082774999999998044586391188204288482666015625,
        "lon": 23.16977669999999989158823154866695404052734375
    },
    "last_point": {
        "ts": "2026-03-28T20:25:09+00:00",
        "lat": 37.06596499999999849706000532023608684539794921875,
        "lon": 23.20767670000000038044163375161588191986083984375
    }
}
Methodology: 2026.01.18
Sts Laconian Gulf STS Zone
Mar 28, 2026 13:02 UTC 90/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 47 meters
  • Duration: 3h 46m
  • Period: 2026-03-28T13:33:06+00:00 to 2026-03-28T17:19:25+00:00
  • Vessel A Avg Speed: 0.6 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 47m) for 226 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 47m
Duration25/25Duration 226 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency12/15Distance variance ±44m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 47.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 44.2999999999999971578290569595992565155029296875,
    "duration_minutes": 226.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 13579,
    "speed_a_avg": 0.56999999999999995115018691649311222136020660400390625,
    "speed_a_std": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.5100000000000000088817841970012523233890533447265625,
    "speed_b_std": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.56999999999999995115018691649311222136020660400390625,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.5100000000000000088817841970012523233890533447265625,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T13:33:06+00:00",
        "end": "2026-03-28T17:19:25+00:00"
    },
    "points_count": {
        "vessel_a": 70,
        "vessel_b": 70
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 47m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 226 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; very stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b144m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 47m) for 226 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 13:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 27m
  • Data Points: 45 AIS positions
  • Period: 2026-03-28T13:57:39+00:00 to 2026-03-28T20:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 387.5,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-03-28T13:57:39+00:00",
        "lat": 37.082498299999997470877133309841156005859375,
        "lon": 23.16969830000000030167939257808029651641845703125
    },
    "last_point": {
        "ts": "2026-03-28T20:25:09+00:00",
        "lat": 37.06596499999999849706000532023608684539794921875,
        "lon": 23.20767670000000038044163375161588191986083984375
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 13:01 UTC 75.0% ▼
  • Duration: 1h 51m
  • Radius: 1,130 meters
  • Data Points: 19 AIS positions
  • Centroid: 37.0896, 23.1728
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1129.700000000000045474735088646411895751953125,
    "duration_minutes": 111,
    "points": 19,
    "centroid": {
        "lat": 37.089624473684210670398897491395473480224609375,
        "lon": 23.172773594736842284191880025900900363922119140625
    },
    "bbox": {
        "min_lat": 37.082498299999997470877133309841156005859375,
        "min_lon": 23.16969830000000030167939257808029651641845703125,
        "max_lat": 37.09846830000000039717633626423776149749755859375,
        "max_lon": 23.17906500000000136196831590496003627777099609375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 28, 2026 12:07 UTC 95/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 42 meters
  • Duration: 4h 59m
  • Period: 2026-03-28T12:07:25+00:00 to 2026-03-28T17:06:36+00:00
  • Vessel A Avg Speed: 0.5 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 42m) for 299 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 42m
Duration25/25Duration 299 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±28m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T18:47:10.986403+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 42.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 28.10000000000000142108547152020037174224853515625,
    "duration_minutes": 299.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 17951,
    "speed_a_avg": 0.5,
    "speed_a_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0.429999999999999993338661852249060757458209991455078125,
    "speed_b_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.5,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.429999999999999993338661852249060757458209991455078125,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T12:07:25+00:00",
        "end": "2026-03-28T17:06:36+00:00"
    },
    "points_count": {
        "vessel_a": 89,
        "vessel_b": 89
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 299 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 42m) for 299 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.09068330000000202062437892891466617584228515625,
            "lon": 23.17420560000000051559254643507301807403564453125
        },
        "time_window": {
            "start_ts": "2026-03-28T12:07:25+00:00",
            "end_ts": "2026-03-28T17:06:36+00:00"
        },
        "searched_at": "2026-03-28T18:47:10.986403+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 12:05 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 5m
  • Data Points: 61 AIS positions
  • Period: 2026-03-28T12:05:19+00:00 to 2026-03-28T17:10:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 305.3999999999999772626324556767940521240234375,
    "points_in_zone": 61,
    "first_point": {
        "ts": "2026-03-28T12:05:19+00:00",
        "lat": 37.0819249999999982492226990871131420135498046875,
        "lon": 23.159376699999999260626282193697988986968994140625
    },
    "last_point": {
        "ts": "2026-03-28T17:10:44+00:00",
        "lat": 37.1011299999999977217157720588147640228271484375,
        "lon": 23.19311330000000026529960450716316699981689453125
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 12:05 UTC 75.0% ▼
  • Duration: 2h 31m
  • Radius: 1,121 meters
  • Data Points: 30 AIS positions
  • Centroid: 37.0845, 23.1695
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1120.799999999999954525264911353588104248046875,
    "duration_minutes": 151.80000000000001136868377216160297393798828125,
    "points": 30,
    "centroid": {
        "lat": 37.08454000333333766548093990422785282135009765625,
        "lon": 23.169496390000002605802364996634423732757568359375
    },
    "bbox": {
        "min_lat": 37.079880000000002837623469531536102294921875,
        "min_lon": 23.163791700000000872705641086213290691375732421875,
        "max_lat": 37.09372330000000062000253819860517978668212890625,
        "max_lon": 23.174743299999999379679138655774295330047607421875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts Laconian Gulf STS Zone
Mar 28, 2026 11:18 UTC 95/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 42 meters
  • Duration: 5h 48m
  • Period: 2026-03-28T11:18:25+00:00 to 2026-03-28T17:06:36+00:00
  • Vessel A Avg Speed: 0.5 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 42m) for 348 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 42m
Duration25/25Duration 348 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±27m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 42.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 27.39999999999999857891452847979962825775146484375,
    "duration_minutes": 348.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 20891,
    "speed_a_avg": 0.4899999999999999911182158029987476766109466552734375,
    "speed_a_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0.419999999999999984456877655247808434069156646728515625,
    "speed_b_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.4899999999999999911182158029987476766109466552734375,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.419999999999999984456877655247808434069156646728515625,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-03-28T11:18:25+00:00",
        "end": "2026-03-28T17:06:36+00:00"
    },
    "points_count": {
        "vessel_a": 97,
        "vessel_b": 97
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 348 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b127m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 8m, avg 42m) for 348 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 11:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 9m
  • Data Points: 68 AIS positions
  • Period: 2026-03-28T11:01:39+00:00 to 2026-03-28T17:10:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 369.1000000000000227373675443232059478759765625,
    "points_in_zone": 68,
    "first_point": {
        "ts": "2026-03-28T11:01:39+00:00",
        "lat": 37.0836766999999980498614604584872722625732421875,
        "lon": 23.153298299999999443343767779879271984100341796875
    },
    "last_point": {
        "ts": "2026-03-28T17:10:44+00:00",
        "lat": 37.1011299999999977217157720588147640228271484375,
        "lon": 23.19311330000000026529960450716316699981689453125
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 11:01 UTC 75.0% ▼
  • Duration: 3h 25m
  • Radius: 1,136 meters
  • Data Points: 39 AIS positions
  • Centroid: 37.0835, 23.1670
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1136.09999999999990905052982270717620849609375,
    "duration_minutes": 205.69999999999998863131622783839702606201171875,
    "points": 39,
    "centroid": {
        "lat": 37.0835276948718046696740202605724334716796875,
        "lon": 23.167013933333340247600062866695225238800048828125
    },
    "bbox": {
        "min_lat": 37.079880000000002837623469531536102294921875,
        "min_lon": 23.156375000000000596855898038484156131744384765625,
        "max_lat": 37.09224499999999835608832654543220996856689453125,
        "max_lon": 23.173713299999999293277141987346112728118896484375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts Laconian Gulf STS Zone
Mar 28, 2026 10:25 UTC 80/100 ▼
Vessel A: IMO 9506150 (GAZ EXPLORER) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 6 meters
  • Average Distance: 32 meters
  • Duration: 46 minutes
  • Period: 2026-03-28T10:25:56+00:00 to 2026-03-28T11:11:56+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 6m, avg 32m) for 46 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 Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 6m, avg 32m
Duration10/25Duration 46 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±24m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 354588000,
        "imo": 9506150,
        "name": "GAZ EXPLORER",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 5.79999999999999982236431605997495353221893310546875,
    "avg_distance_m": 32.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 24.39999999999999857891452847979962825775146484375,
    "duration_minutes": 46,
    "overlap_duration_s": 2760,
    "speed_a_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-03-28T10:25:56+00:00",
        "end": "2026-03-28T11:11:56+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 32m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 46 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b124m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAZ EXPLORER and GAZ FRATERNITY) maintained close proximity (min 6m, avg 32m) for 46 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 Laconian Gulf STS Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 10:24 UTC 75.0% ▼
  • Duration: 4h 5m
  • Radius: 1,166 meters
  • Data Points: 43 AIS positions
  • Centroid: 37.0831, 23.1649
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1165.700000000000045474735088646411895751953125,
    "duration_minutes": 245.19999999999998863131622783839702606201171875,
    "points": 43,
    "centroid": {
        "lat": 37.0831332186046580545735196210443973541259765625,
        "lon": 23.164921548837209996918318211100995540618896484375
    },
    "bbox": {
        "min_lat": 37.079880000000002837623469531536102294921875,
        "min_lon": 23.153233300000000127738530864007771015167236328125,
        "max_lat": 37.0913249999999976580511429347097873687744140625,
        "max_lon": 23.173128299999998347402652143500745296478271484375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 10:24 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 16m
  • Data Points: 69 AIS positions
  • Period: 2026-03-28T10:53:59+00:00 to 2026-03-28T17:10:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 376.80000000000001136868377216160297393798828125,
    "points_in_zone": 69,
    "first_point": {
        "ts": "2026-03-28T10:53:59+00:00",
        "lat": 37.0830533000000031051968107931315898895263671875,
        "lon": 23.153233300000000127738530864007771015167236328125
    },
    "last_point": {
        "ts": "2026-03-28T17:10:44+00:00",
        "lat": 37.1011299999999977217157720588147640228271484375,
        "lon": 23.19311330000000026529960450716316699981689453125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 06:14 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 31m
  • Data Points: 23 AIS positions
  • Period: 2026-03-28T06:25:09+00:00 to 2026-03-28T12:56:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 391.30000000000001136868377216160297393798828125,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-03-28T06:25:09+00:00",
        "lat": 37.0617749999999972487785271368920803070068359375,
        "lon": 23.156253299999999484271029359661042690277099609375
    },
    "last_point": {
        "ts": "2026-03-28T12:56:28+00:00",
        "lat": 37.07990170000000063055267673917114734649658203125,
        "lon": 23.165285000000000792397258919663727283477783203125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 05:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 34m
  • Data Points: 18 AIS positions
  • Period: 2026-03-28T05:41:08+00:00 to 2026-03-28T12:15:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 394,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-03-28T05:41:08+00:00",
        "lat": 37.06909329999999869187377043999731540679931640625,
        "lon": 23.14502999999999843794284970499575138092041015625
    },
    "last_point": {
        "ts": "2026-03-28T12:15:09+00:00",
        "lat": 37.081445000000002210072125308215618133544921875,
        "lon": 23.16048500000000132104105432517826557159423828125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 04:03 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 33m
  • Data Points: 21 AIS positions
  • Period: 2026-03-28T04:53:48+00:00 to 2026-03-28T11:27:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 393.80000000000001136868377216160297393798828125,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-03-28T04:53:48+00:00",
        "lat": 37.1155432999999987941919243894517421722412109375,
        "lon": 23.12371830000000016980266082100570201873779296875
    },
    "last_point": {
        "ts": "2026-03-28T11:27:38+00:00",
        "lat": 37.0835416999999978315827320329844951629638671875,
        "lon": 23.15515669999999914807631284929811954498291015625
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 03:30 UTC 75.0% ▼
  • Duration: 1h 41m
  • Radius: 704 meters
  • Data Points: 29 AIS positions
  • Centroid: 37.1113, 23.1227
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 703.700000000000045474735088646411895751953125,
    "duration_minutes": 101.7999999999999971578290569595992565155029296875,
    "points": 29,
    "centroid": {
        "lat": 37.1113395413793085708675789646804332733154296875,
        "lon": 23.122698737931035140036328812129795551300048828125
    },
    "bbox": {
        "min_lat": 37.10649000000000086174622992984950542449951171875,
        "min_lon": 23.120059999999998723296812386251986026763916015625,
        "max_lat": 37.11615830000000215704858419485390186309814453125,
        "max_lon": 23.12824330000000117024683277122676372528076171875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 03:03 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 33m
  • Data Points: 33 AIS positions
  • Period: 2026-03-28T03:51:00+00:00 to 2026-03-28T10:24:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 393.5,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-03-28T03:51:00+00:00",
        "lat": 37.1086667000000005600668373517692089080810546875,
        "lon": 23.121798299999998249631971702910959720611572265625
    },
    "last_point": {
        "ts": "2026-03-28T10:24:29+00:00",
        "lat": 37.07980169999999731089701526798307895660400390625,
        "lon": 23.15334500000000161890056915581226348876953125
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 02:08 UTC 75.0% ▼
  • Duration: 3h 3m
  • Radius: 1,440 meters
  • Data Points: 52 AIS positions
  • Centroid: 37.1069, 23.1201
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1440.40000000000009094947017729282379150390625,
    "duration_minutes": 183.30000000000001136868377216160297393798828125,
    "points": 52,
    "centroid": {
        "lat": 37.10685618653845807557445368729531764984130859375,
        "lon": 23.1200992038461521360659389756619930267333984375
    },
    "bbox": {
        "min_lat": 37.09457669999999751553332316689193248748779296875,
        "min_lon": 23.114850000000000562749846721999347209930419921875,
        "max_lat": 37.11615830000000215704858419485390186309814453125,
        "max_lon": 23.12824330000000117024683277122676372528076171875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 02:08 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 4h 16m
  • Data Points: 61 AIS positions
  • Period: 2026-03-28T02:08:38+00:00 to 2026-03-28T06:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 256.5,
    "points_in_zone": 61,
    "first_point": {
        "ts": "2026-03-28T02:08:38+00:00",
        "lat": 37.09457669999999751553332316689193248748779296875,
        "lon": 23.114850000000000562749846721999347209930419921875
    },
    "last_point": {
        "ts": "2026-03-28T06:25:09+00:00",
        "lat": 37.0617749999999972487785271368920803070068359375,
        "lon": 23.156253299999999484271029359661042690277099609375
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 01:11 UTC 75.0% ▼
  • Duration: 3h 18m
  • Radius: 1,646 meters
  • Data Points: 53 AIS positions
  • Centroid: 37.1066, 23.1200
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1645.90000000000009094947017729282379150390625,
    "duration_minutes": 198.5,
    "points": 53,
    "centroid": {
        "lat": 37.1065880188679244611194008029997348785400390625,
        "lon": 23.119977992452827919578339788131415843963623046875
    },
    "bbox": {
        "min_lat": 37.09264329999999887377271079458296298980712890625,
        "min_lon": 23.11367500000000063664629124104976654052734375,
        "max_lat": 37.11615830000000215704858419485390186309814453125,
        "max_lon": 23.12824330000000117024683277122676372528076171875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 01:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 24m
  • Data Points: 75 AIS positions
  • Period: 2026-03-28T01:00:40+00:00 to 2026-03-28T06:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 324.5,
    "points_in_zone": 75,
    "first_point": {
        "ts": "2026-03-28T01:00:40+00:00",
        "lat": 37.08661829999999781648511998355388641357421875,
        "lon": 23.1070117000000010420990292914211750030517578125
    },
    "last_point": {
        "ts": "2026-03-28T06:25:09+00:00",
        "lat": 37.0617749999999972487785271368920803070068359375,
        "lon": 23.156253299999999484271029359661042690277099609375
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 28, 2026 00:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 24m
  • Data Points: 92 AIS positions
  • Period: 2026-03-28T00:00:49+00:00 to 2026-03-28T06:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 384.30000000000001136868377216160297393798828125,
    "points_in_zone": 92,
    "first_point": {
        "ts": "2026-03-28T00:00:49+00:00",
        "lat": 37.079943299999996497717802412807941436767578125,
        "lon": 23.09946169999999909805410425178706645965576171875
    },
    "last_point": {
        "ts": "2026-03-28T06:25:09+00:00",
        "lat": 37.0617749999999972487785271368920803070068359375,
        "lon": 23.156253299999999484271029359661042690277099609375
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 28, 2026 00:00 UTC 75.0% ▼
  • Duration: 2h 4m
  • Radius: 1,135 meters
  • Data Points: 30 AIS positions
  • Centroid: 37.0928, 23.1122
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1135.09999999999990905052982270717620849609375,
    "duration_minutes": 124.5,
    "points": 30,
    "centroid": {
        "lat": 37.0928000533333346311337663792073726654052734375,
        "lon": 23.112162059999999286219463101588189601898193359375
    },
    "bbox": {
        "min_lat": 37.08547329999999675465005566366016864776611328125,
        "min_lon": 23.1049517000000008692950359545648097991943359375,
        "max_lat": 37.10249499999999756028046249412000179290771484375,
        "max_lon": 23.116230000000001609805622138082981109619140625
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 23:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 34m
  • Data Points: 95 AIS positions
  • Period: 2026-03-27T23:50:49+00:00 to 2026-03-28T06:25:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-03-27T23:50:49+00:00",
        "lat": 37.0783916999999973995727486908435821533203125,
        "lon": 23.099301700000001602575139258988201618194580078125
    },
    "last_point": {
        "ts": "2026-03-28T06:25:09+00:00",
        "lat": 37.0617749999999972487785271368920803070068359375,
        "lon": 23.156253299999999484271029359661042690277099609375
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 23:00 UTC 75.0% ▼
  • Duration: 2h 2m
  • Radius: 1,131 meters
  • Data Points: 34 AIS positions
  • Centroid: 37.0851, 23.1052
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1130.5,
    "duration_minutes": 122.7000000000000028421709430404007434844970703125,
    "points": 34,
    "centroid": {
        "lat": 37.08508534117647315042631817050278186798095703125,
        "lon": 23.105150100000006574418875970877707004547119140625
    },
    "bbox": {
        "min_lat": 37.0783916999999973995727486908435821533203125,
        "min_lon": 23.099301700000001602575139258988201618194580078125,
        "max_lat": 37.09264329999999887377271079458296298980712890625,
        "max_lon": 23.11367500000000063664629124104976654052734375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 22:37 UTC 75.0% ▼
  • Duration: 2h 40m
  • Radius: 1,184 meters
  • Data Points: 42 AIS positions
  • Centroid: 37.0813, 23.1023
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1184.09999999999990905052982270717620849609375,
    "duration_minutes": 160.400000000000005684341886080801486968994140625,
    "points": 42,
    "centroid": {
        "lat": 37.08134794047619919865610427223145961761474609375,
        "lon": 23.102329088095242326517109177075326442718505859375
    },
    "bbox": {
        "min_lat": 37.073745000000002391971065662801265716552734375,
        "min_lon": 23.090965000000000628688212600536644458770751953125,
        "max_lat": 37.08943500000000170757630257867276668548583984375,
        "max_lon": 23.110624999999998863131622783839702606201171875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 22:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 32m
  • Data Points: 100 AIS positions
  • Period: 2026-03-27T22:52:40+00:00 to 2026-03-28T05:24:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 392,
    "points_in_zone": 100,
    "first_point": {
        "ts": "2026-03-27T22:52:40+00:00",
        "lat": 37.07680500000000023419488570652902126312255859375,
        "lon": 23.099586699999999694910002290271222591400146484375
    },
    "last_point": {
        "ts": "2026-03-28T05:24:39+00:00",
        "lat": 37.089889999999996916812960989773273468017578125,
        "lon": 23.13640170000000040317900129593908786773681640625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 27, 2026 21:04 UTC 85/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 26 meters
  • Duration: 1h 12m
  • Period: 2026-03-27T21:04:58+00:00 to 2026-03-27T22:17:08+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 26m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 26m
Duration15/25Duration 72 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T04:00:34.245256+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8,
    "avg_distance_m": 25.699999999999999289457264239899814128875732421875,
    "distance_consistency_m": 10.300000000000000710542735760100185871124267578125,
    "duration_minutes": 72.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4330,
    "speed_a_avg": 0.40000000000000002220446049250313080847263336181640625,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.429999999999999993338661852249060757458209991455078125,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.40000000000000002220446049250313080847263336181640625,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.429999999999999993338661852249060757458209991455078125,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        }
    },
    "time_window": {
        "start": "2026-03-27T21:04:58+00:00",
        "end": "2026-03-27T22:17:08+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 26m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 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: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 26m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.06378720000000015488694771192967891693115234375,
            "lon": 23.121521300000001275520844501443207263946533203125
        },
        "time_window": {
            "start_ts": "2026-03-27T21:04:58+00:00",
            "end_ts": "2026-03-27T22:17:08+00:00"
        },
        "searched_at": "2026-03-28T04:00:34.245256+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 21:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 109 AIS positions
  • Period: 2026-03-27T21:51:29+00:00 to 2026-03-28T04:26:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395,
    "points_in_zone": 109,
    "first_point": {
        "ts": "2026-03-27T21:51:29+00:00",
        "lat": 37.06565830000000261179593508131802082061767578125,
        "lon": 23.11833169999999881838448345661163330078125
    },
    "last_point": {
        "ts": "2026-03-28T04:26:28+00:00",
        "lat": 37.11274829999999980145730660296976566314697265625,
        "lon": 23.123194999999999055262378533370792865753173828125
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 21:01 UTC 75.0% ▼
  • Duration: 1h 32m
  • Radius: 1,123 meters
  • Data Points: 29 AIS positions
  • Centroid: 37.0649, 23.1198
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1122.700000000000045474735088646411895751953125,
    "duration_minutes": 92.5,
    "points": 29,
    "centroid": {
        "lat": 37.0649435000000124773578136228024959564208984375,
        "lon": 23.1198251724137975315898074768483638763427734375
    },
    "bbox": {
        "min_lat": 37.05975500000000266709321294911205768585205078125,
        "min_lon": 23.107711699999999410692907986231148242950439453125,
        "max_lat": 37.0687817000000023881511879153549671173095703125,
        "max_lon": 23.126028300000001536318450234830379486083984375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 27, 2026 20:34 UTC 90/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 28 meters
  • Duration: 1h 42m
  • Period: 2026-03-27T20:34:58+00:00 to 2026-03-27T22:17:08+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 28m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 28m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T02:47:11.387439+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8,
    "avg_distance_m": 28.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 11.199999999999999289457264239899814128875732421875,
    "duration_minutes": 102.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 6130,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.40000000000000002220446049250313080847263336181640625,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.40000000000000002220446049250313080847263336181640625,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        }
    },
    "time_window": {
        "start": "2026-03-27T20:34:58+00:00",
        "end": "2026-03-27T22:17:08+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 28m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 102 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 28m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.062636400000002367960405535995960235595703125,
            "lon": 23.12288480000000134850779431872069835662841796875
        },
        "time_window": {
            "start_ts": "2026-03-27T20:34:58+00:00",
            "end_ts": "2026-03-27T22:17:08+00:00"
        },
        "searched_at": "2026-03-28T02:47:11.387439+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 20:23 UTC 75.0% ▼
  • Duration: 2h 7m
  • Radius: 1,019 meters
  • Data Points: 37 AIS positions
  • Centroid: 37.0633, 23.1221
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1018.6000000000000227373675443232059478759765625,
    "duration_minutes": 127.2999999999999971578290569595992565155029296875,
    "points": 37,
    "centroid": {
        "lat": 37.06334665945945516796200536191463470458984375,
        "lon": 23.122060764864869497614563442766666412353515625
    },
    "bbox": {
        "min_lat": 37.05727499999999707824827055446803569793701171875,
        "min_lon": 23.112526700000000090540197561495006084442138671875,
        "max_lat": 37.0687817000000023881511879153549671173095703125,
        "max_lon": 23.129175000000000039790393202565610408782958984375
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 20:16 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 34m
  • Data Points: 107 AIS positions
  • Period: 2026-03-27T20:52:39+00:00 to 2026-03-28T03:26:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 107,
    "first_point": {
        "ts": "2026-03-27T20:52:39+00:00",
        "lat": 37.05912500000000164845914696343243122100830078125,
        "lon": 23.1269750000000016143530956469476222991943359375
    },
    "last_point": {
        "ts": "2026-03-28T03:26:58+00:00",
        "lat": 37.106189999999998008206603117287158966064453125,
        "lon": 23.11966170000000175832610693760216236114501953125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 27, 2026 19:52 UTC 95/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 8 meters
  • Average Distance: 29 meters
  • Duration: 2h 24m
  • Period: 2026-03-27T19:52:48+00:00 to 2026-03-27T22:17:08+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 29m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 29m
Duration25/25Duration 144 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T00:30:01.702519+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 8,
    "avg_distance_m": 28.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 11.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 144.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 8660,
    "speed_a_avg": 0.34999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.35999999999999998667732370449812151491641998291015625,
    "speed_b_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.34999999999999997779553950749686919152736663818359375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.35999999999999998667732370449812151491641998291015625,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        }
    },
    "time_window": {
        "start": "2026-03-27T19:52:48+00:00",
        "end": "2026-03-27T22:17:08+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 29m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 144 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 8m, avg 29m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.0612387999999981502696755342185497283935546875,
            "lon": 23.124164100000001553780748508870601654052734375
        },
        "time_window": {
            "start_ts": "2026-03-27T19:52:48+00:00",
            "end_ts": "2026-03-27T22:17:08+00:00"
        },
        "searched_at": "2026-03-28T00:30:01.702519+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 19:34 UTC 75.0% ▼
  • Duration: 2h 47m
  • Radius: 1,125 meters
  • Data Points: 41 AIS positions
  • Centroid: 37.0625, 23.1228
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1124.59999999999990905052982270717620849609375,
    "duration_minutes": 167.5,
    "points": 41,
    "centroid": {
        "lat": 37.06253421951220161645323969423770904541015625,
        "lon": 23.122807682926836747583365649916231632232666015625
    },
    "bbox": {
        "min_lat": 37.0541733000000022002495825290679931640625,
        "min_lon": 23.112526700000000090540197561495006084442138671875,
        "max_lat": 37.0687817000000023881511879153549671173095703125,
        "max_lon": 23.129916699999998996872818679548799991607666015625
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 19:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 99 AIS positions
  • Period: 2026-03-27T19:52:39+00:00 to 2026-03-28T02:27:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395,
    "points_in_zone": 99,
    "first_point": {
        "ts": "2026-03-27T19:52:39+00:00",
        "lat": 37.0546183000000013407770893536508083343505859375,
        "lon": 23.129916699999998996872818679548799991607666015625
    },
    "last_point": {
        "ts": "2026-03-28T02:27:39+00:00",
        "lat": 37.0975049999999981764631229452788829803466796875,
        "lon": 23.115971699999999344754542107693850994110107421875
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 18:14 UTC 75.0% ▼
  • Duration: 2h 54m
  • Radius: 1,135 meters
  • Data Points: 39 AIS positions
  • Centroid: 37.0567, 23.1264
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1135.40000000000009094947017729282379150390625,
    "duration_minutes": 174.80000000000001136868377216160297393798828125,
    "points": 39,
    "centroid": {
        "lat": 37.056739356410247410167357884347438812255859375,
        "lon": 23.126419658974352699942755862139165401458740234375
    },
    "bbox": {
        "min_lat": 37.047466700000001083026290871202945709228515625,
        "min_lon": 23.118943300000001528360371594317257404327392578125,
        "max_lat": 37.06503169999999869332896196283400058746337890625,
        "max_lon": 23.129916699999998996872818679548799991607666015625
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 18:14 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 34m
  • Data Points: 102 AIS positions
  • Period: 2026-03-27T18:51:09+00:00 to 2026-03-28T01:25:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 394.5,
    "points_in_zone": 102,
    "first_point": {
        "ts": "2026-03-27T18:51:09+00:00",
        "lat": 37.047466700000001083026290871202945709228515625,
        "lon": 23.12664170000000041227394831366837024688720703125
    },
    "last_point": {
        "ts": "2026-03-28T01:25:38+00:00",
        "lat": 37.08943500000000170757630257867276668548583984375,
        "lon": 23.110624999999998863131622783839702606201171875
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Mar 27, 2026 17:40 UTC 75.0% ▼
  • Duration: 3h 45m
  • Radius: 1,725 meters
  • Data Points: 47 AIS positions
  • Centroid: 37.0530, 23.1274
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1724.5,
    "duration_minutes": 225.30000000000001136868377216160297393798828125,
    "points": 47,
    "centroid": {
        "lat": 37.0530299617021228186786174774169921875,
        "lon": 23.127353831914888360188342630863189697265625
    },
    "bbox": {
        "min_lat": 37.0378249999999979991116560995578765869140625,
        "min_lon": 23.12261000000000166210156749002635478973388671875,
        "max_lat": 37.06242830000000054724296205677092075347900390625,
        "max_lon": 23.131350000000001188027454190887510776519775390625
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 27, 2026 17:00 UTC 93/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 5 meters
  • Average Distance: 33 meters
  • Duration: 5h 16m
  • Period: 2026-03-27T17:00:29+00:00 to 2026-03-27T22:17:08+00:00
  • Vessel A Avg Speed: 0.5 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 93/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 5m, avg 33m) for 317 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 5m, avg 33m
Duration25/25Duration 317 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-28T00:00:34.247923+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 5.0999999999999996447286321199499070644378662109375,
    "avg_distance_m": 32.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 20.39999999999999857891452847979962825775146484375,
    "duration_minutes": 316.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 18999,
    "speed_a_avg": 0.5,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.5100000000000000088817841970012523233890533447265625,
    "speed_b_std": 0.289999999999999980015985556747182272374629974365234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.5,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.5100000000000000088817841970012523233890533447265625,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-03-27T17:00:29+00:00",
        "end": "2026-03-27T22:17:08+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 93,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 5m, avg 33m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 317 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; 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: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 5m, avg 33m) for 317 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.0530485000000027184796635992825031280517578125,
            "lon": 23.1262344000000013011231203563511371612548828125
        },
        "time_window": {
            "start_ts": "2026-03-27T17:00:29+00:00",
            "end_ts": "2026-03-27T22:17:08+00:00"
        },
        "searched_at": "2026-03-28T00:00:34.247923+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 17:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 31m
  • Data Points: 95 AIS positions
  • Period: 2026-03-27T17:56:00+00:00 to 2026-03-28T00:27:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 391.5,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-03-27T17:56:00+00:00",
        "lat": 37.040216700000001992520992644131183624267578125,
        "lon": 23.130058300000001736407284624874591827392578125
    },
    "last_point": {
        "ts": "2026-03-28T00:27:29+00:00",
        "lat": 37.0829082999999997127815731801092624664306640625,
        "lon": 23.101903300000000029967850423417985439300537109375
    }
}
Methodology: 2026.01.18
Sts Laconian Gulf STS Zone
Mar 27, 2026 16:30 UTC 93/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 5 meters
  • Average Distance: 29 meters
  • Duration: 5h 46m
  • Period: 2026-03-27T16:30:18+00:00 to 2026-03-27T22:17:08+00:00
  • Vessel A Avg Speed: 0.6 knots
  • Vessel B Avg Speed: 0.6 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 93/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 5m, avg 29m) for 347 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 5m, avg 29m
Duration25/25Duration 347 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency15/15Distance variance ±15m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 5.0999999999999996447286321199499070644378662109375,
    "avg_distance_m": 28.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 15,
    "duration_minutes": 346.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 20810,
    "speed_a_avg": 0.560000000000000053290705182007513940334320068359375,
    "speed_a_std": 0.299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.560000000000000053290705182007513940334320068359375,
    "speed_b_std": 0.299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.560000000000000053290705182007513940334320068359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.560000000000000053290705182007513940334320068359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-03-27T16:30:18+00:00",
        "end": "2026-03-27T22:17:08+00:00"
    },
    "points_count": {
        "vessel_a": 27,
        "vessel_b": 27
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 93,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 5m, avg 29m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 347 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; very 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: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 5m, avg 29m) for 347 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 16:10 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 37m
  • Data Points: 94 AIS positions
  • Period: 2026-03-27T16:51:50+00:00 to 2026-03-27T23:29:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 397.30000000000001136868377216160297393798828125,
    "points_in_zone": 94,
    "first_point": {
        "ts": "2026-03-27T16:51:50+00:00",
        "lat": 37.02381170000000309983079205267131328582763671875,
        "lon": 23.12922999999999973397279973141849040985107421875
    },
    "last_point": {
        "ts": "2026-03-27T23:29:09+00:00",
        "lat": 37.07526829999999762321749585680663585662841796875,
        "lon": 23.099013299999999304645825759507715702056884765625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 15:14 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 32m
  • Data Points: 87 AIS positions
  • Period: 2026-03-27T15:44:49+00:00 to 2026-03-27T22:17:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 392.5,
    "points_in_zone": 87,
    "first_point": {
        "ts": "2026-03-27T15:44:49+00:00",
        "lat": 37.072076699999996662882040254771709442138671875,
        "lon": 23.17685829999999924666553852148354053497314453125
    },
    "last_point": {
        "ts": "2026-03-27T22:17:18+00:00",
        "lat": 37.06819169999999985520844347774982452392578125,
        "lon": 23.118481700000000245154296862892806529998779296875
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 14:12 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 33m
  • Data Points: 75 AIS positions
  • Period: 2026-03-27T14:32:48+00:00 to 2026-03-27T21:06:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 393.8999999999999772626324556767940521240234375,
    "points_in_zone": 75,
    "first_point": {
        "ts": "2026-03-27T14:32:48+00:00",
        "lat": 37.1122016999999999598003341816365718841552734375,
        "lon": 23.18787499999999823785401531495153903961181640625
    },
    "last_point": {
        "ts": "2026-03-27T21:06:40+00:00",
        "lat": 37.0602032999999977391780703328549861907958984375,
        "lon": 23.125376700000000340651240549050271511077880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 12:03 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 24m
  • Data Points: 58 AIS positions
  • Period: 2026-03-27T12:49:20+00:00 to 2026-03-27T19:13:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 384.30000000000001136868377216160297393798828125,
    "points_in_zone": 58,
    "first_point": {
        "ts": "2026-03-27T12:49:20+00:00",
        "lat": 37.090433300000000826912582851946353912353515625,
        "lon": 23.154946699999999992769517120905220508575439453125
    },
    "last_point": {
        "ts": "2026-03-27T19:13:38+00:00",
        "lat": 37.05097169999999806577761773951351642608642578125,
        "lon": 23.127673300000001432863427908159792423248291015625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 11:56 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 30m
  • Data Points: 53 AIS positions
  • Period: 2026-03-27T11:56:28+00:00 to 2026-03-27T18:27:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 390.69999999999998863131622783839702606201171875,
    "points_in_zone": 53,
    "first_point": {
        "ts": "2026-03-27T11:56:28+00:00",
        "lat": 37.07621999999999928832039586268365383148193359375,
        "lon": 23.1360150000000004411049303598701953887939453125
    },
    "last_point": {
        "ts": "2026-03-27T18:27:09+00:00",
        "lat": 37.04417500000000273985278909094631671905517578125,
        "lon": 23.127681700000000120098775369115173816680908203125
    }
}
Methodology: 2026.01.18
Sts Laconian Gulf STS Zone
Mar 27, 2026 11:50 UTC 83/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 7 meters
  • Average Distance: 53 meters
  • Duration: 5h 26m
  • Period: 2026-03-27T11:50:28+00:00 to 2026-03-27T17:16:58+00:00
  • Vessel A Avg Speed: 1.0 knots
  • Vessel B Avg Speed: 1.0 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 83/100

High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 6m, avg 53m) for 326 minutes. Both vessels were slow-moving (avg speeds 1.0 and 1.0 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 6m, avg 53m
Duration25/25Duration 326 minutes
Speed Stability15/20both slow; very stable speeds
Distance Consistency8/15Distance variance ±72m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 6.5,
    "avg_distance_m": 52.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 72.099999999999994315658113919198513031005859375,
    "duration_minutes": 326.5,
    "overlap_duration_s": 19590,
    "speed_a_avg": 1.020000000000000017763568394002504646778106689453125,
    "speed_a_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_avg": 1.0100000000000000088817841970012523233890533447265625,
    "speed_b_std": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 1.020000000000000017763568394002504646778106689453125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 1.0100000000000000088817841970012523233890533447265625,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        }
    },
    "time_window": {
        "start": "2026-03-27T11:50:28+00:00",
        "end": "2026-03-27T17:16:58+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 83,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 53m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 326 minutes"
            },
            "speed_stability": {
                "score": 15,
                "max": 20,
                "detail": "both slow; very stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b172m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 6m, avg 53m) for 326 minutes. Both vessels were slow-moving (avg speeds 1.0 and 1.0 knots). Moderate distance variation observed during the encounter. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 10:07 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 46 AIS positions
  • Period: 2026-03-27T10:50:56+00:00 to 2026-03-27T17:25:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395.1000000000000227373675443232059478759765625,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-03-27T10:50:56+00:00",
        "lat": 37.06067329999999770961949252523481845855712890625,
        "lon": 23.115384999999999848796505830250680446624755859375
    },
    "last_point": {
        "ts": "2026-03-27T17:25:59+00:00",
        "lat": 37.0339017000000012558302842080593109130859375,
        "lon": 23.1319349999999985811882652342319488525390625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Mar 27, 2026 09:49 UTC 74/100 ▼
Vessel A: IMO 9507764 (GAS HUSKY) Liberia
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 52 meters
  • Average Distance: 219 meters
  • Duration: 2h 5m
  • Period: 2026-03-27T09:49:09+00:00 to 2026-03-27T11:54:37+00:00
  • Vessel A Avg Speed: 1.5 knots
  • Vessel B Avg Speed: 1.4 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 74/100

Moderate-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 52m, avg 219m) for 126 minutes. Both vessels were slow-moving (avg speeds 1.5 and 1.4 knots). Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 219m
Duration25/25Duration 126 minutes
Speed Stability12/20both slow; stable speeds
Distance Consistency2/15Distance variance ±163m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-03-27T15:30:01.963966+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636015107,
        "imo": 9507764,
        "name": "GAS HUSKY",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 52.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 219.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 163.19999999999998863131622783839702606201171875,
    "duration_minutes": 125.5,
    "overlap_duration_s": 7528,
    "speed_a_avg": 1.5,
    "speed_a_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_b_avg": 1.399999999999999911182158029987476766109466552734375,
    "speed_b_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 1.5,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 1.399999999999999911182158029987476766109466552734375,
            "max_sog": 1.600000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-03-27T09:49:09+00:00",
        "end": "2026-03-27T11:54:37+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 74,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 219m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 126 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both slow; stable speeds"
            },
            "distance_consistency": {
                "score": 2,
                "max": 15,
                "detail": "Distance variance \u00b1163m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (GAS HUSKY and GAZ FRATERNITY) maintained close proximity (min 52m, avg 219m) for 126 minutes. Both vessels were slow-moving (avg speeds 1.5 and 1.4 knots). Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.0798630999999971891156747005879878997802734375,
            "lon": 23.14338920000000143772922456264495849609375
        },
        "time_window": {
            "start_ts": "2026-03-27T09:49:09+00:00",
            "end_ts": "2026-03-27T11:54:37+00:00"
        },
        "searched_at": "2026-03-27T15:30:01.963966+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 09:43 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 31m
  • Data Points: 41 AIS positions
  • Period: 2026-03-27T09:55:38+00:00 to 2026-03-27T16:26:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 391.19999999999998863131622783839702606201171875,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-03-27T09:55:38+00:00",
        "lat": 37.089910000000003265085979364812374114990234375,
        "lon": 23.1586716999999993049641489051282405853271484375
    },
    "last_point": {
        "ts": "2026-03-27T16:26:49+00:00",
        "lat": 37.01830499999999801730155013501644134521484375,
        "lon": 23.135390000000001009539118967950344085693359375
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 07:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 47m
  • Data Points: 28 AIS positions
  • Period: 2026-03-27T07:01:49+00:00 to 2026-03-27T12:49:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 347.5,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-03-27T07:01:49+00:00",
        "lat": 36.98527829999999738674887339584529399871826171875,
        "lon": 23.126336699999999524379745707847177982330322265625
    },
    "last_point": {
        "ts": "2026-03-27T12:49:20+00:00",
        "lat": 37.090433300000000826912582851946353912353515625,
        "lon": 23.154946699999999992769517120905220508575439453125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 06:11 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 38m
  • Data Points: 32 AIS positions
  • Period: 2026-03-27T06:11:00+00:00 to 2026-03-27T12:49:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 398.30000000000001136868377216160297393798828125,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-03-27T06:11:00+00:00",
        "lat": 37.06618329999999872370608500204980373382568359375,
        "lon": 23.154759999999999564579411526210606098175048828125
    },
    "last_point": {
        "ts": "2026-03-27T12:49:20+00:00",
        "lat": 37.090433300000000826912582851946353912353515625,
        "lon": 23.154946699999999992769517120905220508575439453125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 05:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 36m
  • Data Points: 32 AIS positions
  • Period: 2026-03-27T05:50:49+00:00 to 2026-03-27T12:27:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 396.8999999999999772626324556767940521240234375,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-03-27T05:50:49+00:00",
        "lat": 37.1006866999999971312718116678297519683837890625,
        "lon": 23.166218300000000596128302277065813541412353515625
    },
    "last_point": {
        "ts": "2026-03-27T12:27:40+00:00",
        "lat": 37.084828299999998080238583497703075408935546875,
        "lon": 23.14643170000000083064151112921535968780517578125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 04:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 29m
  • Data Points: 50 AIS positions
  • Period: 2026-03-27T04:21:38+00:00 to 2026-03-27T10:50:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 389.30000000000001136868377216160297393798828125,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-03-27T04:21:38+00:00",
        "lat": 37.1469299999999975625541992485523223876953125,
        "lon": 23.1834750000000013869794202037155628204345703125
    },
    "last_point": {
        "ts": "2026-03-27T10:50:56+00:00",
        "lat": 37.06067329999999770961949252523481845855712890625,
        "lon": 23.115384999999999848796505830250680446624755859375
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 03:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 53 AIS positions
  • Period: 2026-03-27T03:53:18+00:00 to 2026-03-27T10:28:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395,
    "points_in_zone": 53,
    "first_point": {
        "ts": "2026-03-27T03:53:18+00:00",
        "lat": 37.143585000000001627995516173541545867919921875,
        "lon": 23.176798300000001518128556199371814727783203125
    },
    "last_point": {
        "ts": "2026-03-27T10:28:19+00:00",
        "lat": 37.08499830000000230256773647852241992950439453125,
        "lon": 23.144393300000000834870661492459475994110107421875
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 02:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 29m
  • Data Points: 83 AIS positions
  • Period: 2026-03-27T02:00:58+00:00 to 2026-03-27T07:29:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 329,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-03-27T02:00:58+00:00",
        "lat": 37.125591700000001083026290871202945709228515625,
        "lon": 23.13944169999999900255716056562960147857666015625
    },
    "last_point": {
        "ts": "2026-03-27T07:29:58+00:00",
        "lat": 36.94763830000000126574377645738422870635986328125,
        "lon": 23.13235829999999992878656485117971897125244140625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 01:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 27m
  • Data Points: 107 AIS positions
  • Period: 2026-03-27T01:02:48+00:00 to 2026-03-27T07:29:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 387.19999999999998863131622783839702606201171875,
    "points_in_zone": 107,
    "first_point": {
        "ts": "2026-03-27T01:02:48+00:00",
        "lat": 37.10824670000000224945324589498341083526611328125,
        "lon": 23.128370000000000317186277243308722972869873046875
    },
    "last_point": {
        "ts": "2026-03-27T07:29:58+00:00",
        "lat": 36.94763830000000126574377645738422870635986328125,
        "lon": 23.13235829999999992878656485117971897125244140625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 27, 2026 00:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 27m
  • Data Points: 113 AIS positions
  • Period: 2026-03-27T00:42:28+00:00 to 2026-03-27T07:10:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 387.80000000000001136868377216160297393798828125,
    "points_in_zone": 113,
    "first_point": {
        "ts": "2026-03-27T00:42:28+00:00",
        "lat": 37.10250500000000073441697168163955211639404296875,
        "lon": 23.124678299999999353531165979802608489990234375
    },
    "last_point": {
        "ts": "2026-03-27T07:10:18+00:00",
        "lat": 36.9714416999999997415216057561337947845458984375,
        "lon": 23.125073300000000386944520869292318820953369140625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 26, 2026 23:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 128 AIS positions
  • Period: 2026-03-26T23:50:18+00:00 to 2026-03-27T06:25:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395,
    "points_in_zone": 128,
    "first_point": {
        "ts": "2026-03-26T23:50:18+00:00",
        "lat": 37.08915830000000113386704470030963420867919921875,
        "lon": 23.118565000000000253521648119203746318817138671875
    },
    "last_point": {
        "ts": "2026-03-27T06:25:19+00:00",
        "lat": 37.0430266999999986410330166108906269073486328125,
        "lon": 23.146255000000000023874235921539366245269775390625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 26, 2026 22:03 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 36m
  • Data Points: 140 AIS positions
  • Period: 2026-03-26T22:52:09+00:00 to 2026-03-27T05:28:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 396.80000000000001136868377216160297393798828125,
    "points_in_zone": 140,
    "first_point": {
        "ts": "2026-03-26T22:52:09+00:00",
        "lat": 37.06701170000000189475031220354139804840087890625,
        "lon": 23.116448299999998283738023019395768642425537109375
    },
    "last_point": {
        "ts": "2026-03-27T05:28:59+00:00",
        "lat": 37.13660829999999890560502535663545131683349609375,
        "lon": 23.186408300000000082263795775361359119415283203125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Mar 26, 2026 21:16 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 35m
  • Data Points: 137 AIS positions
  • Period: 2026-03-26T21:50:18+00:00 to 2026-03-27T04:25:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 395,
    "points_in_zone": 137,
    "first_point": {
        "ts": "2026-03-26T21:50:18+00:00",
        "lat": 37.0492382999999989579009707085788249969482421875,
        "lon": 23.1189667000000014240868040360510349273681640625
    },
    "last_point": {
        "ts": "2026-03-27T04:25:19+00:00",
        "lat": 37.1474132999999966386894811876118183135986328125,
        "lon": 23.184463300000000884892870089970529079437255859375
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Feb 28, 2026 02:11 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 1h 26m
  • Data Points: 36 AIS positions
  • Period: 2026-02-28T02:11:35+00:00 to 2026-02-28T03:37:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_024",
    "zone_name": "Northern Barents Sea Surveillance Zone",
    "dwell_minutes": 86.2999999999999971578290569595992565155029296875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-02-28T02:11:35+00:00",
        "lat": 37.23411999999999721921994932927191257476806640625,
        "lon": 3.423648299999999977671905071474611759185791015625
    },
    "last_point": {
        "ts": "2026-02-28T03:37:56+00:00",
        "lat": 37.20051000000000129830368678085505962371826171875,
        "lon": 3.06017500000000008952838470577262341976165771484375
    }
}
Methodology: 2026.01.18
Zone Dwell Malta/Hurd's Bank STS Zone
Feb 25, 2026 15:13 UTC 80.0% ▼
  • Zone: Malta/Hurd's Bank STS Zone
  • Duration: 1h 16m
  • Data Points: 5 AIS positions
  • Period: 2026-02-25T15:13:07+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_malta_hurds_bank",
    "zone_name": "Malta\/Hurd's Bank STS Zone",
    "dwell_minutes": 76.2999999999999971578290569595992565155029296875,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-02-25T15:13:07+00:00",
        "lat": 36.07747330000000118843672680668532848358154296875,
        "lon": 14.7465066999999994123982105520553886890411376953125
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Feb 25, 2026 15:13 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 1h 16m
  • Data Points: 5 AIS positions
  • Period: 2026-02-25T15:13:07+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_020",
    "zone_name": "Eastern Aegean Monitoring Zone",
    "dwell_minutes": 76.2999999999999971578290569595992565155029296875,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-02-25T15:13:07+00:00",
        "lat": 36.07747330000000118843672680668532848358154296875,
        "lon": 14.7465066999999994123982105520553886890411376953125
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Feb 25, 2026 14:11 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 2h 17m
  • Data Points: 13 AIS positions
  • Period: 2026-02-25T14:11:55+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_020",
    "zone_name": "Eastern Aegean Monitoring Zone",
    "dwell_minutes": 137.5,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-02-25T14:11:55+00:00",
        "lat": 36.01161499999999904275682638399302959442138671875,
        "lon": 14.8379066999999995601910995901562273502349853515625
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Malta/Hurd's Bank STS Zone
Feb 25, 2026 14:11 UTC 80.0% ▼
  • Zone: Malta/Hurd's Bank STS Zone
  • Duration: 2h 17m
  • Data Points: 13 AIS positions
  • Period: 2026-02-25T14:11:55+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_malta_hurds_bank",
    "zone_name": "Malta\/Hurd's Bank STS Zone",
    "dwell_minutes": 137.5,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-02-25T14:11:55+00:00",
        "lat": 36.01161499999999904275682638399302959442138671875,
        "lon": 14.8379066999999995601910995901562273502349853515625
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Malta/Hurd's Bank STS Zone
Feb 25, 2026 13:41 UTC 80.0% ▼
  • Zone: Malta/Hurd's Bank STS Zone
  • Duration: 2h 47m
  • Data Points: 14 AIS positions
  • Period: 2026-02-25T13:41:46+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_malta_hurds_bank",
    "zone_name": "Malta\/Hurd's Bank STS Zone",
    "dwell_minutes": 167.599999999999994315658113919198513031005859375,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-02-25T13:41:46+00:00",
        "lat": 36.01196829999999948768163449130952358245849609375,
        "lon": 14.971186700000000513455233885906636714935302734375
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Feb 25, 2026 13:41 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 2h 47m
  • Data Points: 14 AIS positions
  • Period: 2026-02-25T13:41:46+00:00 to 2026-02-25T16:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_020",
    "zone_name": "Eastern Aegean Monitoring Zone",
    "dwell_minutes": 167.599999999999994315658113919198513031005859375,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-02-25T13:41:46+00:00",
        "lat": 36.01196829999999948768163449130952358245849609375,
        "lon": 14.971186700000000513455233885906636714935302734375
    },
    "last_point": {
        "ts": "2026-02-25T16:29:24+00:00",
        "lat": 36.0483832999999975754690240137279033660888671875,
        "lon": 14.712733300000000014051693142391741275787353515625
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 22:09 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 1h 9m
  • Data Points: 4 AIS positions
  • Period: 2026-02-21T22:09:34+00:00 to 2026-02-21T23:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 69.7000000000000028421709430404007434844970703125,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-02-21T22:09:34+00:00",
        "lat": 36.8732667000000020607330952771008014678955078125,
        "lon": 23.25987500000000096633812063373625278472900390625
    },
    "last_point": {
        "ts": "2026-02-21T23:19:13+00:00",
        "lat": 36.8638882999999992762241163291037082672119140625,
        "lon": 23.26425830000000161135176313109695911407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 21:07 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 2h 11m
  • Data Points: 5 AIS positions
  • Period: 2026-02-21T21:07:24+00:00 to 2026-02-21T23:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 131.80000000000001136868377216160297393798828125,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-02-21T21:07:24+00:00",
        "lat": 36.8822382999999973662852426059544086456298828125,
        "lon": 23.257071700000000902264218893833458423614501953125
    },
    "last_point": {
        "ts": "2026-02-21T23:19:13+00:00",
        "lat": 36.8638882999999992762241163291037082672119140625,
        "lon": 23.26425830000000161135176313109695911407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 20:05 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 3h 13m
  • Data Points: 7 AIS positions
  • Period: 2026-02-21T20:05:53+00:00 to 2026-02-21T23:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 193.30000000000001136868377216160297393798828125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-02-21T20:05:53+00:00",
        "lat": 36.895368300000001227090251632034778594970703125,
        "lon": 23.257736699999998819521351833827793598175048828125
    },
    "last_point": {
        "ts": "2026-02-21T23:19:13+00:00",
        "lat": 36.8638882999999992762241163291037082672119140625,
        "lon": 23.26425830000000161135176313109695911407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 19:22 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 3h 56m
  • Data Points: 10 AIS positions
  • Period: 2026-02-21T19:22:54+00:00 to 2026-02-21T23:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 236.30000000000001136868377216160297393798828125,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-02-21T19:22:54+00:00",
        "lat": 36.907915000000002692104317247867584228515625,
        "lon": 23.257811700000001309263097937218844890594482421875
    },
    "last_point": {
        "ts": "2026-02-21T23:19:13+00:00",
        "lat": 36.8638882999999992762241163291037082672119140625,
        "lon": 23.26425830000000161135176313109695911407470703125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Feb 21, 2026 18:55 UTC 60/100 ▼
Vessel A: IMO 9232321 (GAS SPANAKOPITA) Sierra Leone
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 38 meters
  • Average Distance: 227 meters
  • Duration: 37 minutes
  • Period: 2026-02-21T18:55:31+00:00 to 2026-02-21T19:32:32+00:00
  • Vessel A Avg Speed: 1.3 knots
  • Vessel B Avg Speed: 1.1 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (GAS SPANAKOPITA and GAZ FRATERNITY) maintained close proximity (min 38m, avg 227m) for 37 minutes. Both vessels were slow-moving (avg speeds 1.3 and 1.1 knots). Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 38m, avg 227m
Duration5/25Duration 37 minutes
Speed Stability15/20both slow; very stable speeds
Distance Consistency5/15Distance variance ±136m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-02-21T20:00:01.474448+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 667002512,
        "imo": 9232321,
        "name": "GAS SPANAKOPITA",
        "flag": "Sierra Leone"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 37.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 226.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 135.80000000000001136868377216160297393798828125,
    "duration_minutes": 37,
    "overlap_duration_s": 2221,
    "speed_a_avg": 1.270000000000000017763568394002504646778106689453125,
    "speed_a_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 1.12999999999999989341858963598497211933135986328125,
    "speed_b_std": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 1.270000000000000017763568394002504646778106689453125,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 1.12999999999999989341858963598497211933135986328125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        }
    },
    "time_window": {
        "start": "2026-02-21T18:55:31+00:00",
        "end": "2026-02-21T19:32:32+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 38m, avg 227m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 37 minutes"
            },
            "speed_stability": {
                "score": 15,
                "max": 20,
                "detail": "both slow; very stable speeds"
            },
            "distance_consistency": {
                "score": 5,
                "max": 15,
                "detail": "Distance variance \u00b1136m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Laconian Gulf STS Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (GAS SPANAKOPITA and GAZ FRATERNITY) maintained close proximity (min 38m, avg 227m) for 37 minutes. Both vessels were slow-moving (avg speeds 1.3 and 1.1 knots). Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 36.91027679999999833171386853791773319244384765625,
            "lon": 23.25472849999999880310497246682643890380859375
        },
        "time_window": {
            "start_ts": "2026-02-21T18:55:31+00:00",
            "end_ts": "2026-02-21T19:32:32+00:00"
        },
        "searched_at": "2026-02-21T20:00:01.474448+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 18:02 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 5h 16m
  • Data Points: 13 AIS positions
  • Period: 2026-02-21T18:02:54+00:00 to 2026-02-21T23:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 316.30000000000001136868377216160297393798828125,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-02-21T18:02:54+00:00",
        "lat": 36.92502669999999653782651876099407672882080078125,
        "lon": 23.23069170000000127629391499795019626617431640625
    },
    "last_point": {
        "ts": "2026-02-21T23:19:13+00:00",
        "lat": 36.8638882999999992762241163291037082672119140625,
        "lon": 23.26425830000000161135176313109695911407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 21, 2026 16:01 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 6h 13m
  • Data Points: 12 AIS positions
  • Period: 2026-02-21T16:01:15+00:00 to 2026-02-21T22:15:04+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 373.80000000000001136868377216160297393798828125,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-02-21T16:01:15+00:00",
        "lat": 36.93041000000000195768734556622803211212158203125,
        "lon": 23.20556669999999854780980967916548252105712890625
    },
    "last_point": {
        "ts": "2026-02-21T22:15:04+00:00",
        "lat": 36.87241999999999819692675373516976833343505859375,
        "lon": 23.26031830000000155678208102472126483917236328125
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 20, 2026 22:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 1h 44m
  • Data Points: 19 AIS positions
  • Period: 2026-02-20T22:00:34+00:00 to 2026-02-20T23:45:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 104.7000000000000028421709430404007434844970703125,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-02-20T22:00:34+00:00",
        "lat": 37.0961233000000021320374798960983753204345703125,
        "lon": 23.05736999999999881083567743189632892608642578125
    },
    "last_point": {
        "ts": "2026-02-20T23:45:15+00:00",
        "lat": 36.9855500000000034788172342814505100250244140625,
        "lon": 23.117491699999998644443621742539107799530029296875
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Laconian Gulf STS Zone
Feb 20, 2026 21:00 UTC 78/100 ▼
Vessel A: IMO 9699256 (GREMIO) Panama
Vessel B: IMO 9448487 (GAZ FRATERNITY) Panama
  • Minimum Distance: 14 meters
  • Average Distance: 39 meters
  • Duration: 58 minutes
  • Period: 2026-02-20T21:00:21+00:00 to 2026-02-20T21:58:20+00:00
  • Vessel A Avg Speed: 0.7 knots
  • Vessel B Avg Speed: 0.6 knots
  • Zone: Laconian Gulf STS Zone

Confidence Analysis

Score: 78/100

Moderate-confidence STS candidate. Two tankers (GREMIO and GAZ FRATERNITY) maintained close proximity (min 14m, avg 38m) for 58 minutes. Both vessels were slow-moving (avg speeds 0.7 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 14m, avg 38m
Duration10/25Duration 58 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Laconian Gulf STS Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-02-21T03:45:06.765476+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 373028000,
        "imo": 9699256,
        "name": "GREMIO",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 372668000,
        "imo": 9448487,
        "name": "GAZ FRATERNITY",
        "flag": "Panama"
    },
    "min_distance_m": 13.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 38.5,
    "distance_consistency_m": 13.199999999999999289457264239899814128875732421875,
    "duration_minutes": 58,
    "overlap_duration_s": 3479,
    "speed_a_avg": 0.67000000000000003996802888650563545525074005126953125,
    "speed_a_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_avg": 0.58999999999999996891375531049561686813831329345703125,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.67000000000000003996802888650563545525074005126953125,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.58999999999999996891375531049561686813831329345703125,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-02-20T21:00:21+00:00",
        "end": "2026-02-20T21:58:20+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "score": {
        "value": 78,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 38m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 58 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; 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: Laconian Gulf STS Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (GREMIO and GAZ FRATERNITY) maintained close proximity (min 14m, avg 38m) for 58 minutes. Both vessels were slow-moving (avg speeds 0.7 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Laconian Gulf STS Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 37.09481799999999651618054485879838466644287109375,
            "lon": 23.06497420000000175832610693760216236114501953125
        },
        "time_window": {
            "start_ts": "2026-02-20T21:00:21+00:00",
            "end_ts": "2026-02-20T21:58:20+00:00"
        },
        "searched_at": "2026-02-21T03:45:06.765476+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Laconian Gulf STS Zone
Feb 20, 2026 21:00 UTC 80.0% ▼
  • Zone: Laconian Gulf STS Zone
  • Duration: 2h 45m
  • Data Points: 43 AIS positions
  • Period: 2026-02-20T21:00:13+00:00 to 2026-02-20T23:45:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_laconian_gulf",
    "zone_name": "Laconian Gulf STS Zone",
    "dwell_minutes": 165,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-02-20T21:00:13+00:00",
        "lat": 37.0919616999999988138370099477469921112060546875,
        "lon": 23.06995330000000166137397172860801219940185546875
    },
    "last_point": {
        "ts": "2026-02-20T23:45:15+00:00",
        "lat": 36.9855500000000034788172342814505100250244140625,
        "lon": 23.117491699999998644443621742539107799530029296875
    }
}
Methodology: 2026.01.18
Loiter Laconian Gulf STS Zone
Feb 20, 2026 20:12 UTC 75.0% ▼
  • Duration: 1h 36m
  • Radius: 1,121 meters
  • Data Points: 39 AIS positions
  • Centroid: 37.0928, 23.0670
  • Zone: Laconian Gulf STS Zone
Show Raw Evidence JSON
{
    "radius_m": 1120.90000000000009094947017729282379150390625,
    "duration_minutes": 96.7999999999999971578290569595992565155029296875,
    "points": 39,
    "centroid": {
        "lat": 37.092759794871795975268469192087650299072265625,
        "lon": 23.06701196666666220380648155696690082550048828125
    },
    "bbox": {
        "min_lat": 37.08575499999999891542756813578307628631591796875,
        "min_lon": 23.0547550000000001091393642127513885498046875,
        "max_lat": 37.09628670000000028039721655659377574920654296875,
        "max_lon": 23.074633299999998570228854077868163585662841796875
    },
    "zone_id": "osint_laconian_gulf"
}
Methodology: 2026.01.18

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.