AZOV

{
    "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": 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_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "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: Sakhalin South Approach"
            }
        },
        "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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "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"
    }
}

{
    "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_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "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: Sakhalin South Approach"
            }
        },
        "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 Sakhalin South Approach, 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": 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_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "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: Sakhalin South Approach"
            }
        },
        "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 Sakhalin South Approach, 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": 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": 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_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "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: Sakhalin South Approach"
            }
        },
        "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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "pending"
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 395.3999999999999772626324556767940521240234375,
    "points_in_zone": 129,
    "first_point": {
        "ts": "2026-06-03T16:53:00+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T23:28:22+00:00",
        "lat": 46.6219166999999998779458110220730304718017578125,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 395.3999999999999772626324556767940521240234375,
    "points_in_zone": 129,
    "first_point": {
        "ts": "2026-06-03T16:53:00+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T23:28:22+00:00",
        "lat": 46.6219166999999998779458110220730304718017578125,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.3999999999999772626324556767940521240234375,
    "points": 129,
    "centroid": {
        "lat": 46.621939259689867185443290509283542633056640625,
        "lon": 142.76870155193824984962702728807926177978515625
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.3999999999999772626324556767940521240234375,
    "points": 129,
    "centroid": {
        "lat": 46.621939259689867185443290509283542633056640625,
        "lon": 142.76870155193824984962702728807926177978515625
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "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": 411.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 160.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9614,
    "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": "2026-06-03T15:18:37+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 49,
        "vessel_b": 49
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 160 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 160 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": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 409.3999999999999772626324556767940521240234375,
    "avg_distance_m": 411.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 160.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9614,
    "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": "2026-06-03T15:18:37+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 49,
        "vessel_b": 49
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 160 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 409m, avg 412m) for 160 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 Sakhalin South Approach, 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": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 385.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23154,
    "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": "2026-06-03T15:46:09+00:00",
        "end": "2026-06-03T22:12:03+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 218m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 386 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 218m, avg 222m) for 386 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 385.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23154,
    "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": "2026-06-03T15:46:09+00:00",
        "end": "2026-06-03T22:12:03+00:00"
    },
    "points_count": {
        "vessel_a": 124,
        "vessel_b": 124
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 218m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 386 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 218m, avg 222m) for 386 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 398.19999999999998863131622783839702606201171875,
    "points_in_zone": 127,
    "first_point": {
        "ts": "2026-06-03T15:51:09+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T22:29:23+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 398.19999999999998863131622783839702606201171875,
    "points_in_zone": 127,
    "first_point": {
        "ts": "2026-06-03T15:51:09+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T22:29:23+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 398.19999999999998863131622783839702606201171875,
    "points": 127,
    "centroid": {
        "lat": 46.621938566141665205577737651765346527099609375,
        "lon": 142.768701838582984464665059931576251983642578125
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 398.19999999999998863131622783839702606201171875,
    "points": 127,
    "centroid": {
        "lat": 46.621938566141665205577737651765346527099609375,
        "lon": 142.768701838582984464665059931576251983642578125
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "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": 411.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 232.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 13964,
    "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": "2026-06-03T14:06:07+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 72,
        "vessel_b": 72
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 233 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 233 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": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 409.3999999999999772626324556767940521240234375,
    "avg_distance_m": 411.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 232.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 13964,
    "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": "2026-06-03T14:06:07+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 72,
        "vessel_b": 72
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 233 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 409m, avg 412m) for 233 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 Sakhalin South Approach, 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": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 389.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23363,
    "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": "2026-06-03T14:57:28+00:00",
        "end": "2026-06-03T21:26:51+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 218m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 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 218m, avg 222m) for 389 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 389.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23363,
    "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": "2026-06-03T14:57:28+00:00",
        "end": "2026-06-03T21:26:51+00:00"
    },
    "points_count": {
        "vessel_a": 124,
        "vessel_b": 124
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 218m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 218m, avg 222m) for 389 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 395.6000000000000227373675443232059478759765625,
    "points_in_zone": 126,
    "first_point": {
        "ts": "2026-06-03T14:51:17+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T21:26:51+00:00",
        "lat": 46.621966700000001537773641757667064666748046875,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 395.6000000000000227373675443232059478759765625,
    "points_in_zone": 126,
    "first_point": {
        "ts": "2026-06-03T14:51:17+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T21:26:51+00:00",
        "lat": 46.621966700000001537773641757667064666748046875,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.6000000000000227373675443232059478759765625,
    "points": 126,
    "centroid": {
        "lat": 46.62193821349200106851640157401561737060546875,
        "lon": 142.76870264682560218716389499604701995849609375
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.6000000000000227373675443232059478759765625,
    "points": 126,
    "centroid": {
        "lat": 46.62193821349200106851640157401561737060546875,
        "lon": 142.76870264682560218716389499604701995849609375
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.80000000000001136868377216160297393798828125,
    "avg_distance_m": 411.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.5,
    "duration_minutes": 385.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23103,
    "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": "2026-06-03T13:37:03+00:00",
        "end": "2026-06-03T20:02:06+00:00"
    },
    "points_count": {
        "vessel_a": 54,
        "vessel_b": 54
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 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": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 409m, avg 412m) for 385 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.80000000000001136868377216160297393798828125,
    "avg_distance_m": 411.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.5,
    "duration_minutes": 385.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23103,
    "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": "2026-06-03T13:37:03+00:00",
        "end": "2026-06-03T20:02:06+00:00"
    },
    "points_count": {
        "vessel_a": 54,
        "vessel_b": 54
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 409m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 409m, avg 412m) for 385 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23704,
    "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": "2026-06-03T13:52:47+00:00",
        "end": "2026-06-03T20:27:51+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 218m, avg 223m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 395 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 218m, avg 223m) for 395 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 217.900000000000005684341886080801486968994140625,
    "avg_distance_m": 222.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 395.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23704,
    "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": "2026-06-03T13:52:47+00:00",
        "end": "2026-06-03T20:27:51+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 218m, avg 223m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 395 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 218m, avg 223m) for 395 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 124,
    "first_point": {
        "ts": "2026-06-03T13:50:38+00:00",
        "lat": 46.6219166999999998779458110220730304718017578125,
        "lon": 142.7687333000000080573954619467258453369140625
    },
    "last_point": {
        "ts": "2026-06-03T20:27:51+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 124,
    "first_point": {
        "ts": "2026-06-03T13:50:38+00:00",
        "lat": 46.6219166999999998779458110220730304718017578125,
        "lon": 142.7687333000000080573954619467258453369140625
    },
    "last_point": {
        "ts": "2026-06-03T20:27:51+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "radius_m": 4,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 124,
    "centroid": {
        "lat": 46.62193762016125475611261208541691303253173828125,
        "lon": 142.76870363306471745090675540268421173095703125
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 124,
    "centroid": {
        "lat": 46.62193762016125475611261208541691303253173828125,
        "lon": 142.76870363306471745090675540268421173095703125
    },
    "bbox": {
        "min_lat": 46.6219166999999998779458110220730304718017578125,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.5,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 394.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23693,
    "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": "2026-06-03T12:52:47+00:00",
        "end": "2026-06-03T19:27:40+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 395 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 216m, avg 222m) for 395 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.5,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 394.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23693,
    "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": "2026-06-03T12:52:47+00:00",
        "end": "2026-06-03T19:27:40+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 395 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 216m, avg 222m) for 395 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 Sakhalin South Approach, 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": 406.5,
    "avg_distance_m": 411.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 341.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 20515,
    "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": "2026-06-03T12:16:56+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 109,
        "vessel_b": 109
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 342 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": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 406m, avg 412m) for 342 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": 406.5,
    "avg_distance_m": 411.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 341.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 20515,
    "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": "2026-06-03T12:16:56+00:00",
        "end": "2026-06-03T17:58:51+00:00"
    },
    "points_count": {
        "vessel_a": 109,
        "vessel_b": 109
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 412m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 342 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 406m, avg 412m) for 342 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 124,
    "first_point": {
        "ts": "2026-06-03T12:50:37+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T19:27:40+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 124,
    "first_point": {
        "ts": "2026-06-03T12:50:37+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T19:27:40+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 397.1000000000000227373675443232059478759765625,
    "points": 124,
    "centroid": {
        "lat": 46.62193802661285957356085418723523616790771484375,
        "lon": 142.76870444112927316382410936057567596435546875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 397.1000000000000227373675443232059478759765625,
    "points": 124,
    "centroid": {
        "lat": 46.62193802661285957356085418723523616790771484375,
        "lon": 142.76870444112927316382410936057567596435546875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396,
    "overlap_duration_s": 23760,
    "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": "2026-06-03T11:53:05+00:00",
        "end": "2026-06-03T18:29:05+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 396 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": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 396 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396,
    "overlap_duration_s": 23760,
    "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": "2026-06-03T11:53:05+00:00",
        "end": "2026-06-03T18:29:05+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 396 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 396 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23583,
    "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": "2026-06-03T11:53:55+00:00",
        "end": "2026-06-03T18:26:58+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 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 (FLAGMAN and AZOV) maintained close proximity (min 216m, avg 222m) for 393 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23583,
    "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": "2026-06-03T11:53:55+00:00",
        "end": "2026-06-03T18:26:58+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (FLAGMAN and AZOV) maintained close proximity (min 216m, avg 222m) for 393 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T11:52:17+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
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    "last_point": {
        "ts": "2026-06-03T18:29:31+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T11:52:17+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
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    "last_point": {
        "ts": "2026-06-03T18:29:31+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
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{
    "radius_m": 4.5,
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}

{
    "radius_m": 4.5,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 125,
    "centroid": {
        "lat": 46.62193999119994458624205435626208782196044921875,
        "lon": 142.768704403200217711855657398700714111328125
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    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
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        "max_lon": 142.7687333000000080573954619467258453369140625
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{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
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    "duration_minutes": 389,
    "overlap_duration_s": 23339,
    "speed_a_avg": 0,
    "speed_a_std": 0,
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    "speed_b_std": 0,
    "speed_summary": {
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            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
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    },
    "time_window": {
        "start": "2026-06-03T10:56:05+00:00",
        "end": "2026-06-03T17:25:04+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 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": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 389 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 389,
    "overlap_duration_s": 23339,
    "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": "2026-06-03T10:56:05+00:00",
        "end": "2026-06-03T17:25:04+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 389 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 387.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23274,
    "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": "2026-06-03T10:56:26+00:00",
        "end": "2026-06-03T17:24:20+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 223m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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 216m, avg 223m) for 388 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 387.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23274,
    "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": "2026-06-03T10:56:26+00:00",
        "end": "2026-06-03T17:24:20+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 223m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 216m, avg 223m) for 388 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 393.8999999999999772626324556767940521240234375,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T10:53:26+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    },
    "last_point": {
        "ts": "2026-06-03T17:27:20+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 393.8999999999999772626324556767940521240234375,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T10:53:26+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    },
    "last_point": {
        "ts": "2026-06-03T17:27:20+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 393.8999999999999772626324556767940521240234375,
    "points": 125,
    "centroid": {
        "lat": 46.62193919199995661983848549425601959228515625,
        "lon": 142.76870333520020039941300638020038604736328125
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 393.8999999999999772626324556767940521240234375,
    "points": 125,
    "centroid": {
        "lat": 46.62193919199995661983848549425601959228515625,
        "lon": 142.76870333520020039941300638020038604736328125
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 377,
    "overlap_duration_s": 22619,
    "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": "2026-06-03T09:46:04+00:00",
        "end": "2026-06-03T16:03:03+00:00"
    },
    "points_count": {
        "vessel_a": 59,
        "vessel_b": 59
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 377 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": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 377 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 377,
    "overlap_duration_s": 22619,
    "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": "2026-06-03T09:46:04+00:00",
        "end": "2026-06-03T16:03:03+00:00"
    },
    "points_count": {
        "vessel_a": 59,
        "vessel_b": 59
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 377 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 377 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.5,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 388.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23304,
    "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": "2026-06-03T09:45:35+00:00",
        "end": "2026-06-03T16:13:59+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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 216m, avg 222m) for 388 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222.5,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 388.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23304,
    "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": "2026-06-03T09:45:35+00:00",
        "end": "2026-06-03T16:13:59+00:00"
    },
    "points_count": {
        "vessel_a": 123,
        "vessel_b": 123
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 216m, avg 222m) for 388 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 399.19999999999998863131622783839702606201171875,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T09:50:36+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T16:29:50+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 399.19999999999998863131622783839702606201171875,
    "points_in_zone": 125,
    "first_point": {
        "ts": "2026-06-03T09:50:36+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T16:29:50+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    }
}

{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 399.19999999999998863131622783839702606201171875,
    "points": 125,
    "centroid": {
        "lat": 46.62193946079997175502285244874656200408935546875,
        "lon": 142.76870320080018927910714410245418548583984375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 399.19999999999998863131622783839702606201171875,
    "points": 125,
    "centroid": {
        "lat": 46.62193946079997175502285244874656200408935546875,
        "lon": 142.76870320080018927910714410245418548583984375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 378,
    "overlap_duration_s": 22678,
    "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": "2026-06-03T08:57:06+00:00",
        "end": "2026-06-03T15:15:04+00:00"
    },
    "points_count": {
        "vessel_a": 60,
        "vessel_b": 60
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 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 (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 378 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.19999999999998863131622783839702606201171875,
    "avg_distance_m": 411.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 378,
    "overlap_duration_s": 22678,
    "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": "2026-06-03T08:57:06+00:00",
        "end": "2026-06-03T15:15:04+00:00"
    },
    "points_count": {
        "vessel_a": 60,
        "vessel_b": 60
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 378 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23044,
    "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": "2026-06-03T08:59:53+00:00",
        "end": "2026-06-03T15:23:57+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 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 (FLAGMAN and AZOV) maintained close proximity (min 216m, avg 222m) for 384 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": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 216.5,
    "avg_distance_m": 222,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23044,
    "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": "2026-06-03T08:59:53+00:00",
        "end": "2026-06-03T15:23:57+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 216m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (FLAGMAN and AZOV) maintained close proximity (min 216m, avg 222m) for 384 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 128,
    "first_point": {
        "ts": "2026-06-03T08:53:14+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T15:25:47+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 128,
    "first_point": {
        "ts": "2026-06-03T08:53:14+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T15:25:47+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 128,
    "centroid": {
        "lat": 46.62194087890620863845470012165606021881103515625,
        "lon": 142.76870325781266046760720200836658477783203125
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 128,
    "centroid": {
        "lat": 46.62194087890620863845470012165606021881103515625,
        "lon": 142.76870325781266046760720200836658477783203125
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.621966700000001537773641757667064666748046875,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.1000000000000227373675443232059478759765625,
    "avg_distance_m": 411.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 370,
    "overlap_duration_s": 22201,
    "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": "2026-06-03T07:39:03+00:00",
        "end": "2026-06-03T13:49:04+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 370 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 (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 370 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": "not_found",
        "centroid": {
            "lat": 46.623551300000002584056346677243709564208984375,
            "lon": 142.767378100000001950320438481867313385009765625
        },
        "time_window": {
            "start_ts": "2026-06-03T07:19:53+00:00",
            "end_ts": "2026-06-03T13:49:04+00:00"
        },
        "searched_at": "2026-06-03T18:15:06.355528+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.1000000000000227373675443232059478759765625,
    "avg_distance_m": 411.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 370,
    "overlap_duration_s": 22201,
    "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": "2026-06-03T07:39:03+00:00",
        "end": "2026-06-03T13:49:04+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 370 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 370 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.623551300000002584056346677243709564208984375,
            "lon": 142.767378100000001950320438481867313385009765625
        },
        "time_window": {
            "start_ts": "2026-06-03T07:19:53+00:00",
            "end_ts": "2026-06-03T13:49:04+00:00"
        },
        "searched_at": "2026-06-03T18:15:08.837762+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 221.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 386.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 23204,
    "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": "2026-06-03T07:55:34+00:00",
        "end": "2026-06-03T14:22:18+00:00"
    },
    "points_count": {
        "vessel_a": 126,
        "vessel_b": 126
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 387 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 214m, avg 222m) for 387 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": "not_found",
        "centroid": {
            "lat": 46.6229244000000022651875042356550693511962890625,
            "lon": 142.768955299999987573755788616836071014404296875
        },
        "time_window": {
            "start_ts": "2026-06-03T07:03:22+00:00",
            "end_ts": "2026-06-03T14:22:18+00:00"
        },
        "searched_at": "2026-06-03T18:15:01.575111+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 221.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 386.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 23204,
    "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": "2026-06-03T07:55:34+00:00",
        "end": "2026-06-03T14:22:18+00:00"
    },
    "points_count": {
        "vessel_a": 126,
        "vessel_b": 126
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 387 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 214m, avg 222m) for 387 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.6229244000000022651875042356550693511962890625,
            "lon": 142.768955299999987573755788616836071014404296875
        },
        "time_window": {
            "start_ts": "2026-06-03T07:03:22+00:00",
            "end_ts": "2026-06-03T14:22:18+00:00"
        },
        "searched_at": "2026-06-03T18:15:03.968634+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 129,
    "first_point": {
        "ts": "2026-06-03T07:50:24+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.7687333000000080573954619467258453369140625
    },
    "last_point": {
        "ts": "2026-06-03T14:27:27+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 129,
    "first_point": {
        "ts": "2026-06-03T07:50:24+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.7687333000000080573954619467258453369140625
    },
    "last_point": {
        "ts": "2026-06-03T14:27:27+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    }
}

{
    "radius_m": 5,
    "duration_minutes": 397.1000000000000227373675443232059478759765625,
    "points": 129,
    "centroid": {
        "lat": 46.6219423713177860690848319791257381439208984375,
        "lon": 142.76870400775214875466190278530120849609375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 5,
    "duration_minutes": 397.1000000000000227373675443232059478759765625,
    "points": 129,
    "centroid": {
        "lat": 46.6219423713177860690848319791257381439208984375,
        "lon": 142.76870400775214875466190278530120849609375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.7687333000000080573954619467258453369140625
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 221.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 390.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 23416,
    "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": "2026-06-03T06:56:31+00:00",
        "end": "2026-06-03T13:26:47+00:00"
    },
    "points_count": {
        "vessel_a": 127,
        "vessel_b": 127
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 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 214m, avg 222m) for 390 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": "not_found",
        "centroid": {
            "lat": 46.6229263000000031524905352853238582611083984375,
            "lon": 142.768953799999991360891726799309253692626953125
        },
        "time_window": {
            "start_ts": "2026-06-03T06:09:52+00:00",
            "end_ts": "2026-06-03T13:26:47+00:00"
        },
        "searched_at": "2026-06-03T16:45:08.907082+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 221.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 390.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 23416,
    "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": "2026-06-03T06:56:31+00:00",
        "end": "2026-06-03T13:26:47+00:00"
    },
    "points_count": {
        "vessel_a": 127,
        "vessel_b": 127
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 214m, avg 222m) for 390 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.6229263000000031524905352853238582611083984375,
            "lon": 142.768953799999991360891726799309253692626953125
        },
        "time_window": {
            "start_ts": "2026-06-03T06:09:52+00:00",
            "end_ts": "2026-06-03T13:26:47+00:00"
        },
        "searched_at": "2026-06-03T16:45:11.442577+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 407.3999999999999772626324556767940521240234375,
    "avg_distance_m": 411.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 193.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 11632,
    "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": "2026-06-03T06:09:52+00:00",
        "end": "2026-06-03T09:23:44+00:00"
    },
    "points_count": {
        "vessel_a": 63,
        "vessel_b": 63
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 194 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": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 407m, avg 411m) for 194 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": "not_found",
        "centroid": {
            "lat": 46.62355070000000267782525043003261089324951171875,
            "lon": 142.767378299999990076685207895934581756591796875
        },
        "time_window": {
            "start_ts": "2026-06-03T06:09:52+00:00",
            "end_ts": "2026-06-03T09:23:44+00:00"
        },
        "searched_at": "2026-06-03T17:00:01.542383+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 407.3999999999999772626324556767940521240234375,
    "avg_distance_m": 411.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 193.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 11632,
    "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": "2026-06-03T06:09:52+00:00",
        "end": "2026-06-03T09:23:44+00:00"
    },
    "points_count": {
        "vessel_a": 63,
        "vessel_b": 63
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 194 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 407m, avg 411m) for 194 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62355070000000267782525043003261089324951171875,
            "lon": 142.767378299999990076685207895934581756591796875
        },
        "time_window": {
            "start_ts": "2026-06-03T06:09:52+00:00",
            "end_ts": "2026-06-03T09:23:44+00:00"
        },
        "searched_at": "2026-06-03T17:00:04.467185+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 399.3999999999999772626324556767940521240234375,
    "points_in_zone": 130,
    "first_point": {
        "ts": "2026-06-03T06:50:33+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T13:29:56+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 399.3999999999999772626324556767940521240234375,
    "points_in_zone": 130,
    "first_point": {
        "ts": "2026-06-03T06:50:33+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768699999999995498001226224005222320556640625
    },
    "last_point": {
        "ts": "2026-06-03T13:29:56+00:00",
        "lat": 46.621949999999998226485331542789936065673828125,
        "lon": 142.768699999999995498001226224005222320556640625
    }
}

{
    "radius_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 399.3999999999999772626324556767940521240234375,
    "points": 130,
    "centroid": {
        "lat": 46.621941659999947660253383219242095947265625,
        "lon": 142.7687043600002425591810606420040130615234375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.76875000000001136868377216160297393798828125
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 399.3999999999999772626324556767940521240234375,
    "points": 130,
    "centroid": {
        "lat": 46.621941659999947660253383219242095947265625,
        "lon": 142.7687043600002425591810606420040130615234375
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768666700000011360316420905292034149169921875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.76875000000001136868377216160297393798828125
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 222.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 389.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 23374,
    "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": "2026-06-03T05:59:22+00:00",
        "end": "2026-06-03T12:28:56+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 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 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 214m, avg 222m) for 390 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 214.400000000000005684341886080801486968994140625,
    "avg_distance_m": 222.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 389.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 23374,
    "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": "2026-06-03T05:59:22+00:00",
        "end": "2026-06-03T12:28:56+00:00"
    },
    "points_count": {
        "vessel_a": 124,
        "vessel_b": 124
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 214m, avg 222m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 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: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 214m, avg 222m) for 390 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 Sakhalin South Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.1000000000000227373675443232059478759765625,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 385,
    "overlap_duration_s": 23101,
    "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": "2026-06-03T05:28:04+00:00",
        "end": "2026-06-03T11:53:05+00:00"
    },
    "points_count": {
        "vessel_a": 52,
        "vessel_b": 52
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 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 (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 385 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": "not_found",
        "centroid": {
            "lat": 46.62355079999999674100763513706624507904052734375,
            "lon": 142.76737800000000788713805377483367919921875
        },
        "time_window": {
            "start_ts": "2026-06-03T05:04:03+00:00",
            "end_ts": "2026-06-03T11:38:06+00:00"
        },
        "searched_at": "2026-06-03T12:00:04.396252+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 408.1000000000000227373675443232059478759765625,
    "avg_distance_m": 411.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 385,
    "overlap_duration_s": 23101,
    "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": "2026-06-03T05:28:04+00:00",
        "end": "2026-06-03T11:53:05+00:00"
    },
    "points_count": {
        "vessel_a": 52,
        "vessel_b": 52
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 411m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 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: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZAPRAVSHCHIK 05 and AZOV) maintained close proximity (min 408m, avg 411m) for 385 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62355079999999674100763513706624507904052734375,
            "lon": 142.76737800000000788713805377483367919921875
        },
        "time_window": {
            "start_ts": "2026-06-03T05:04:03+00:00",
            "end_ts": "2026-06-03T11:53:05+00:00"
        },
        "searched_at": "2026-06-03T12:00:08.558119+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396.6000000000000227373675443232059478759765625,
    "points_in_zone": 126,
    "first_point": {
        "ts": "2026-06-03T05:52:22+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T12:28:56+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 396.6000000000000227373675443232059478759765625,
    "points_in_zone": 126,
    "first_point": {
        "ts": "2026-06-03T05:52:22+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768716699999998809289536438882350921630859375
    },
    "last_point": {
        "ts": "2026-06-03T12:28:56+00:00",
        "lat": 46.62193330000000202062437892891466617584228515625,
        "lon": 142.768683299999992186712916009128093719482421875
    }
}

{
    "radius_m": 5,
    "duration_minutes": 396.6000000000000227373675443232059478759765625,
    "points": 126,
    "centroid": {
        "lat": 46.6219423206348864141546073369681835174560546875,
        "lon": 142.76870489603197711403481662273406982421875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.76875000000001136868377216160297393798828125
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 5,
    "duration_minutes": 396.6000000000000227373675443232059478759765625,
    "points": 126,
    "centroid": {
        "lat": 46.6219423206348864141546073369681835174560546875,
        "lon": 142.76870489603197711403481662273406982421875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768683299999992186712916009128093719482421875,
        "max_lat": 46.6219832999999965750248520635068416595458984375,
        "max_lon": 142.76875000000001136868377216160297393798828125
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    "zone_id": "russia_sakhalin_south"
}