AIS Events

{
    "radius_m": 506.19999999999998863131622783839702606201171875,
    "duration_minutes": 178.30000000000001136868377216160297393798828125,
    "points": 51,
    "centroid": {
        "lat": 46.56729846274509299064447986893355846405029296875,
        "lon": 142.9241942156862705815001390874385833740234375
    },
    "bbox": {
        "min_lat": 46.5651916999999997415216057561337947845458984375,
        "min_lon": 142.922146700000013197495718486607074737548828125,
        "max_lat": 46.5695333000000033507603802718222141265869140625,
        "max_lon": 142.929946699999987913543009199202060699462890625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 78.099999999999994315658113919198513031005859375,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-06-03T19:58:28+00:00",
        "lat": 46.3970350000000024692781153135001659393310546875,
        "lon": 142.742088300000006029222276993095874786376953125
    },
    "last_point": {
        "ts": "2026-06-03T21:16:34+00:00",
        "lat": 46.39708170000000109212123788893222808837890625,
        "lon": 142.742064999999996643964550457894802093505859375
    }
}

{
    "vessel_a": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 276.19999999999998863131622783839702606201171875,
    "avg_distance_m": 280.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 294,
    "overlap_duration_s": 17642,
    "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": "2026-06-03T18:17:59+00:00",
        "end": "2026-06-03T23:12:01+00:00"
    },
    "points_count": {
        "vessel_a": 57,
        "vessel_b": 57
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 276m, avg 280m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 294 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (FLAGMAN and ZAPRAVSHCHIK 05) maintained close proximity (min 276m, avg 280m) for 294 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 408.30000000000001136868377216160297393798828125,
    "avg_distance_m": 411.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 311.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 18711,
    "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": "2026-06-03T18:13:21+00:00",
        "end": "2026-06-03T23:25:12+00:00"
    },
    "points_count": {
        "vessel_a": 103,
        "vessel_b": 103
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 312 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 408m, avg 412m) for 312 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 276.5,
    "avg_distance_m": 279.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 372,
    "overlap_duration_s": 22322,
    "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": "2026-06-03T17:16:03+00:00",
        "end": "2026-06-03T23:28:05+00:00"
    },
    "points_count": {
        "vessel_a": 59,
        "vessel_b": 59
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 276m, avg 280m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 372 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and FLAGMAN) maintained close proximity (min 276m, avg 280m) for 372 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "pending"
    }
}

{
    "radius_m": 56.2999999999999971578290569595992565155029296875,
    "duration_minutes": 374.8999999999999772626324556767940521240234375,
    "points": 68,
    "centroid": {
        "lat": 46.66155623088236126250194502063095569610595703125,
        "lon": 142.661594898529330066594411619007587432861328125
    },
    "bbox": {
        "min_lat": 46.66146169999999671063051209785044193267822265625,
        "min_lon": 142.660899999999998044586391188204288482666015625,
        "max_lat": 46.6617217000000010784788173623383045196533203125,
        "max_lon": 142.662164999999987458068062551319599151611328125
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 374.8999999999999772626324556767940521240234375,
    "points_in_zone": 68,
    "first_point": {
        "ts": "2026-06-03T17:09:11+00:00",
        "lat": 46.6617049999999977671905071474611759185791015625,
        "lon": 142.660930000000007566995918750762939453125
    },
    "last_point": {
        "ts": "2026-06-03T23:24:07+00:00",
        "lat": 46.66151330000000285735950456000864505767822265625,
        "lon": 142.662029999999987239789334125816822052001953125
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 382.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22943,
    "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": "2026-06-03T17:05:59+00:00",
        "end": "2026-06-03T23:28:22+00:00"
    },
    "points_count": {
        "vessel_a": 124,
        "vessel_b": 124
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 215m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 215m, avg 222m) for 382 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "pending"
    }
}

{
    "radius_m": 6.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "points": 71,
    "centroid": {
        "lat": 46.623906346478889872742001898586750030517578125,
        "lon": 142.769215501408410773365176282823085784912109375
    },
    "bbox": {
        "min_lat": 46.62384999999999735109668108634650707244873046875,
        "min_lon": 142.7691833000000087849912233650684356689453125,
        "max_lat": 46.62393329999999735946403234265744686126708984375,
        "max_lon": 142.76924999999999954525264911353588104248046875
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 384.1000000000000227373675443232059478759765625,
    "points_in_zone": 71,
    "first_point": {
        "ts": "2026-06-03T17:05:58+00:00",
        "lat": 46.62391670000000232221282203681766986846923828125,
        "lon": 142.769216699999986985858413390815258026123046875
    },
    "last_point": {
        "ts": "2026-06-03T23:30:03+00:00",
        "lat": 46.62391670000000232221282203681766986846923828125,
        "lon": 142.769216699999986985858413390815258026123046875
    }
}

{
    "radius_m": 25.10000000000000142108547152020037174224853515625,
    "duration_minutes": 288.1000000000000227373675443232059478759765625,
    "points": 25,
    "centroid": {
        "lat": 46.39805679599999876927540753968060016632080078125,
        "lon": 142.7326541959999985920148901641368865966796875
    },
    "bbox": {
        "min_lat": 46.39783829999999653637132723815739154815673828125,
        "min_lon": 142.73255330000000640211510471999645233154296875,
        "max_lat": 46.3981950000000011868905858136713504791259765625,
        "max_lon": 142.732834999999994352037901990115642547607421875
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 288.1000000000000227373675443232059478759765625,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-06-03T16:59:44+00:00",
        "lat": 46.39798669999999702895365771837532520294189453125,
        "lon": 142.732801700000010214353096671402454376220703125
    },
    "last_point": {
        "ts": "2026-06-03T21:47:47+00:00",
        "lat": 46.39812169999999724723238614387810230255126953125,
        "lon": 142.732638299999990749711287207901477813720703125
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 409.3999999999999772626324556767940521240234375,
    "avg_distance_m": 411.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 112,
    "overlap_duration_s": 6721,
    "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": "2026-06-03T16:06:50+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 36,
        "vessel_b": 36
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 112 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 409m, avg 412m) for 112 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "pending"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 383,
    "overlap_duration_s": 22982,
    "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": "2026-06-03T16:53:00+00:00",
        "end": "2026-06-03T23:16:02+00:00"
    },
    "points_count": {
        "vessel_a": 125,
        "vessel_b": 125
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 215m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 383 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: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 215m, avg 222m) for 383 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 278,
    "avg_distance_m": 279.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1,
    "duration_minutes": 102,
    "overlap_duration_s": 6120,
    "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": "2026-06-03T16:05:58+00:00",
        "end": "2026-06-03T17:47:58+00:00"
    },
    "points_count": {
        "vessel_a": 12,
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                "score": 5,
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                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
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{
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                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
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                "max": 25,
                "detail": "Duration 233 minutes"
            },
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{
    "vessel_a": {
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{
    "vessel_a": {
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                "score": 5,
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