ZONDAR

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538007627,
        "imo": 9290505,
        "name": "BASILIS L",
        "flag": "Marshall Is"
    },
    "min_distance_m": 67,
    "avg_distance_m": 70.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 75,
    "overlap_duration_s": 4501,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-10T18:23:26+00:00",
        "end": "2026-10-10T19:38:27+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 67m, avg 70m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 75 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and BASILIS L) maintained close proximity (min 67m, avg 70m) for 75 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70793429999999801793819642625749111175537109375,
            "lon": 33.32027380000000249538061325438320636749267578125
        },
        "time_window": {
            "start_ts": "2026-10-10T18:23:26+00:00",
            "end_ts": "2026-10-10T19:38:27+00:00"
        },
        "searched_at": "2026-10-10T20:15:12.451075+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538007627,
        "imo": 9290505,
        "name": "BASILIS L",
        "flag": "Marshall Is"
    },
    "min_distance_m": 66.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 70.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 30.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 1803,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-10T17:35:28+00:00",
        "end": "2026-10-10T18:05:31+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 66m, avg 70m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and BASILIS L) maintained close proximity (min 66m, avg 70m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
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            "lon": 33.32027169999999927085809758864343166351318359375
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        "time_window": {
            "start_ts": "2026-10-10T17:35:28+00:00",
            "end_ts": "2026-10-10T18:05:31+00:00"
        },
        "searched_at": "2026-10-10T18:45:06.501630+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 538007627,
        "imo": 9290505,
        "name": "BASILIS L",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
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    "avg_distance_m": 69.400000000000005684341886080801486968994140625,
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    "overlap_duration_s": 21615,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
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            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
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    },
    "time_window": {
        "start": "2026-10-10T15:46:16+00:00",
        "end": "2026-10-10T21:46:31+00:00"
    },
    "points_count": {
        "vessel_a": 29,
        "vessel_b": 29
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BASILIS L and ZONDAR) maintained close proximity (min 65m, avg 69m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
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    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-10-10T15:41:27+00:00",
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{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538007627,
        "imo": 9290505,
        "name": "BASILIS L",
        "flag": "Marshall Is"
    },
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    "avg_distance_m": 69.7000000000000028421709430404007434844970703125,
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    "duration_minutes": 117,
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    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
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    "speed_summary": {
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    },
    "time_window": {
        "start": "2026-10-10T14:59:26+00:00",
        "end": "2026-10-10T16:56:27+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 117 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and BASILIS L) maintained close proximity (min 65m, avg 70m) for 117 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

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    "vessel_a": {
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                "detail": "Min distance 337m, avg 339m"
            },
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                "max": 25,
                "detail": "Duration 84 minutes"
            },
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                "detail": "Distance variance \u00b13m"
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            },
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                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
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        "notes": "No Sentinel-1 scenes covering AOI and time window"
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}

{
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                "detail": "Distance variance \u00b12m"
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            "isolation": {
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            },
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                "score": 5,
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                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
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        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and ZONDAR) maintained close proximity (min 337m, avg 340m) for 258 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
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        "notes": "No Sentinel-1 scenes covering AOI and time window"
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}

{
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{
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                "detail": "Min distance 335m, avg 339m"
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            },
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                "max": 15,
                "detail": "Distance variance \u00b13m"
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}

{
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{
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{
    "zone_id": "discovered_039",
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    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-10-09T19:50:28+00:00",
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{
    "radius_m": 4.20000000000000017763568394002504646778106689453125,
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{
    "vessel_a": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
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    "avg_distance_m": 320.69999999999998863131622783839702606201171875,
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    "duration_minutes": 48,
    "overlap_duration_s": 2879,
    "speed_a_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_a_std": 0.4699999999999999733546474089962430298328399658203125,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
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    "time_window": {
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        "end": "2026-10-09T20:08:06+00:00"
    },
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        "vessel_a": 6,
        "vessel_b": 6
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    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 62,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 311m, avg 321m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b117m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 311m, avg 321m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
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    "min_distance_m": 311.19999999999998863131622783839702606201171875,
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    "duration_minutes": 111,
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    "speed_summary": {
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    },
    "time_window": {
        "start": "2026-10-09T18:17:27+00:00",
        "end": "2026-10-09T20:08:27+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
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    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 311m, avg 318m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 111 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 311m, avg 318m) for 111 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
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    "points_in_zone": 29,
    "first_point": {
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{
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    "first_point": {
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{
    "radius_m": 7.0999999999999996447286321199499070644378662109375,
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{
    "vessel_a": {
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        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
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    "avg_distance_m": 314.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 63,
    "overlap_duration_s": 3780,
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    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
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    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
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    },
    "time_window": {
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        "end": "2026-10-09T17:44:07+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 314m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 313m, avg 314m) for 63 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
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{
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{
    "vessel_a": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
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    "min_distance_m": 313,
    "avg_distance_m": 315.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 78.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4695,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-09T15:07:51+00:00",
        "end": "2026-10-09T16:26:06+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 316m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 78 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 313m, avg 316m) for 78 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
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            "end_ts": "2026-10-09T16:26:06+00:00"
        },
        "searched_at": "2026-10-09T21:45:08.019722+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "discovered_039",
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    "first_point": {
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        "lon": 33.320023300000002564047463238239288330078125
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{
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{
    "vessel_a": {
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    "avg_distance_m": 315.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 132.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 7943,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-09T14:13:43+00:00",
        "end": "2026-10-09T16:26:06+00:00"
    },
    "points_count": {
        "vessel_a": 27,
        "vessel_b": 27
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 316m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 132 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 313m, avg 316m) for 132 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70886209999999749697963125072419643402099609375,
            "lon": 33.32150159999999772253431729041039943695068359375
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        "time_window": {
            "start_ts": "2026-10-09T14:13:43+00:00",
            "end_ts": "2026-10-09T16:26:06+00:00"
        },
        "searched_at": "2026-10-09T20:45:07.817698+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-09T14:29:27+00:00",
        "lat": 34.7081400000000002137312549166381359100341796875,
        "lon": 33.32001669999999649007804691791534423828125
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        "ts": "2026-10-09T20:59:27+00:00",
        "lat": 34.70817670000000276786522590555250644683837890625,
        "lon": 33.32004669999999890706021687947213649749755859375
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{
    "radius_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 390,
    "points": 41,
    "centroid": {
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        "lon": 33.32001890487803308360525988973677158355712890625
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{
    "vessel_a": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 309.5,
    "avg_distance_m": 315.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2,
    "duration_minutes": 176.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 10617,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
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    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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    },
    "time_window": {
        "start": "2026-10-09T13:29:09+00:00",
        "end": "2026-10-09T16:26:06+00:00"
    },
    "points_count": {
        "vessel_a": 38,
        "vessel_b": 38
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 310m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 177 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 310m, avg 315m) for 177 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 399,
    "points_in_zone": 42,
    "first_point": {
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        "lon": 33.32004830000000339396137860603630542755126953125
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    "last_point": {
        "ts": "2026-10-09T20:29:28+00:00",
        "lat": 34.70816169999999800666046212427318096160888671875,
        "lon": 33.32000169999999883430064073763787746429443359375
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}

{
    "radius_m": 9.4000000000000003552713678800500929355621337890625,
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{
    "zone_id": "discovered_039",
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    "dwell_minutes": 375,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-09T12:32:28+00:00",
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        "lon": 33.31999330000000014706529327668249607086181640625
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{
    "radius_m": 9.800000000000000710542735760100185871124267578125,
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    "points": 38,
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{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.5,
    "avg_distance_m": 315.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 186,
    "overlap_duration_s": 11159,
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    "speed_summary": {
        "vessel_a": {
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        "vessel_b": {
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            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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    },
    "time_window": {
        "start": "2026-10-09T12:41:28+00:00",
        "end": "2026-10-09T15:47:27+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 186 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 312m, avg 315m) for 186 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-09T11:59:27+00:00",
        "lat": 34.708134999999998626663000322878360748291015625,
        "lon": 33.32004330000000180689312401227653026580810546875
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        "lat": 34.70814169999999876381480135023593902587890625,
        "lon": 33.32000169999999883430064073763787746429443359375
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{
    "radius_m": 9.800000000000000710542735760100185871124267578125,
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    "points": 38,
    "centroid": {
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{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.5,
    "avg_distance_m": 315.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 309,
    "overlap_duration_s": 18540,
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    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
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    },
    "time_window": {
        "start": "2026-10-09T09:02:27+00:00",
        "end": "2026-10-09T14:11:27+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 309 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 312m, avg 315m) for 309 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
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{
    "radius_m": 9,
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{
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    "radius_m": 8.800000000000000710542735760100185871124267578125,
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{
    "zone_id": "discovered_039",
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{
    "radius_m": 8.300000000000000710542735760100185871124267578125,
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{
    "vessel_a": {
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        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-09T05:04:16+00:00",
        "end": "2026-10-09T07:28:15+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 300m, avg 314m"
            },
            "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 \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 300m, avg 314m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70887710000000225818439503200352191925048828125,
            "lon": 33.32149079999999941037458484061062335968017578125
        },
        "time_window": {
            "start_ts": "2026-10-09T05:04:16+00:00",
            "end_ts": "2026-10-09T07:28:15+00:00"
        },
        "searched_at": "2026-10-09T11:30:10.044796+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-09T05:22:16+00:00",
        "lat": 34.7081567000000035250195651315152645111083984375,
        "lon": 33.32004330000000180689312401227653026580810546875
    },
    "last_point": {
        "ts": "2026-10-09T11:59:27+00:00",
        "lat": 34.708134999999998626663000322878360748291015625,
        "lon": 33.32004330000000180689312401227653026580810546875
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}

{
    "radius_m": 8.300000000000000710542735760100185871124267578125,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 17,
    "centroid": {
        "lat": 34.708154423529407495152554474771022796630859375,
        "lon": 33.32001980588234602009833906777203083038330078125
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    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
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    "zone_id": "discovered_039"
}

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 300.5,
    "avg_distance_m": 313.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 4.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 168.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10083,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-09T04:40:12+00:00",
        "end": "2026-10-09T07:28:15+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 300m, avg 314m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 168 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 300m, avg 314m) for 168 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 382.19999999999998863131622783839702606201171875,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-09T04:40:12+00:00",
        "lat": 34.70814829999999773235686006955802440643310546875,
        "lon": 33.32005500000000353111317963339388370513916015625
    },
    "last_point": {
        "ts": "2026-10-09T11:02:27+00:00",
        "lat": 34.70814829999999773235686006955802440643310546875,
        "lon": 33.31998999999999711008058511652052402496337890625
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}

{
    "radius_m": 8.199999999999999289457264239899814128875732421875,
    "duration_minutes": 382.19999999999998863131622783839702606201171875,
    "points": 19,
    "centroid": {
        "lat": 34.70815386842104288689370150677859783172607421875,
        "lon": 33.32002105263158142633983516134321689605712890625
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    "bbox": {
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        "min_lon": 33.319978300000002491287887096405029296875,
        "max_lat": 34.708179999999998699422576464712619781494140625,
        "max_lon": 33.3200982999999979483618517406284809112548828125
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}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 325.30000000000001136868377216160297393798828125,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-09T02:16:14+00:00",
        "lat": 34.708151700000001937951310537755489349365234375,
        "lon": 33.32003670000000283835106529295444488525390625
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    "last_point": {
        "ts": "2026-10-09T07:41:30+00:00",
        "lat": 34.7081567000000035250195651315152645111083984375,
        "lon": 33.32000670000000042136889533139765262603759765625
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}

{
    "radius_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 325.30000000000001136868377216160297393798828125,
    "points": 20,
    "centroid": {
        "lat": 34.7081532600000031152376323007047176361083984375,
        "lon": 33.3200244199999957572799758054316043853759765625
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    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.319978300000002491287887096405029296875,
        "max_lat": 34.708179999999998699422576464712619781494140625,
        "max_lon": 33.3200982999999979483618517406284809112548828125
    },
    "zone_id": "discovered_039"
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 361.30000000000001136868377216160297393798828125,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-09T01:40:13+00:00",
        "lat": 34.7081400000000002137312549166381359100341796875,
        "lon": 33.32000000000000028421709430404007434844970703125
    },
    "last_point": {
        "ts": "2026-10-09T07:41:30+00:00",
        "lat": 34.7081567000000035250195651315152645111083984375,
        "lon": 33.32000670000000042136889533139765262603759765625
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}

{
    "radius_m": 8,
    "duration_minutes": 361.30000000000001136868377216160297393798828125,
    "points": 22,
    "centroid": {
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        "lon": 33.3200225772727236517312121577560901641845703125
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    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.319978300000002491287887096405029296875,
        "max_lat": 34.708179999999998699422576464712619781494140625,
        "max_lon": 33.3200982999999979483618517406284809112548828125
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    "zone_id": "discovered_039"
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-09T00:52:13+00:00",
        "lat": 34.7081366999999971767465467564761638641357421875,
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    "last_point": {
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        "lat": 34.7081749999999971123543218709528446197509765625,
        "lon": 33.319981699999999591454979963600635528564453125
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}

{
    "radius_m": 4.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 396,
    "points": 19,
    "centroid": {
        "lat": 34.7081543052631644741268246434628963470458984375,
        "lon": 33.3200197368420987231729668565094470977783203125
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    "bbox": {
        "min_lat": 34.70811830000000242080204770900309085845947265625,
        "min_lon": 33.319978300000002491287887096405029296875,
        "max_lat": 34.708179999999998699422576464712619781494140625,
        "max_lon": 33.32005500000000353111317963339388370513916015625
    },
    "zone_id": "discovered_039"
}

{
    "vessel_a": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 314,
    "avg_distance_m": 315.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 41.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 2502,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-09T00:17:17+00:00",
        "end": "2026-10-09T00:58:59+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 314m, avg 315m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NAVIGATOR and ZONDAR) maintained close proximity (min 314m, avg 315m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.8999999999999772626324556767940521240234375,
    "avg_distance_m": 314.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 360,
    "overlap_duration_s": 21600,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-08T23:58:16+00:00",
        "end": "2026-10-09T05:58:16+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 312m, avg 315m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-08T23:58:16+00:00",
        "lat": 34.70814829999999773235686006955802440643310546875,
        "lon": 33.32003329999999863275661482475697994232177734375
    },
    "last_point": {
        "ts": "2026-10-09T06:28:15+00:00",
        "lat": 34.70816169999999800666046212427318096160888671875,
        "lon": 33.319978300000002491287887096405029296875
    }
}

{
    "radius_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 390,
    "points": 18,
    "centroid": {
        "lat": 34.70815268888889448817280936054885387420654296875,
        "lon": 33.320021566666667922618216834962368011474609375
    },
    "bbox": {
        "min_lat": 34.70811830000000242080204770900309085845947265625,
        "min_lon": 33.319978300000002491287887096405029296875,
        "max_lat": 34.708179999999998699422576464712619781494140625,
        "max_lon": 33.32005500000000353111317963339388370513916015625
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    "zone_id": "discovered_039"
}

{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 538012063,
        "imo": 9370719,
        "name": "NAVIGATOR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 313.30000000000001136868377216160297393798828125,
    "avg_distance_m": 315.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 254.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 15296,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-08T22:13:16+00:00",
        "end": "2026-10-09T02:28:12+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 255 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and NAVIGATOR) maintained close proximity (min 313m, avg 315m) for 255 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-08T22:55:13+00:00",
        "lat": 34.70813170000000269510564976371824741363525390625,
        "lon": 33.3200317000000012512828106991946697235107421875
    },
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