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": 406,
    "avg_distance_m": 407.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 57,
    "overlap_duration_s": 3421,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T03:37:54+00:00",
        "end": "2026-07-19T04:34:55+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 408m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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 406m, avg 408m) for 57 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in 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,
    "avg_distance_m": 407.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 57,
    "overlap_duration_s": 3421,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T03:37:54+00:00",
        "end": "2026-07-19T04:34:55+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 408m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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 406m, avg 408m) for 57 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in 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": 406.80000000000001136868377216160297393798828125,
    "avg_distance_m": 408.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 168.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 10132,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T00:38:33+00:00",
        "end": "2026-07-19T03:27:25+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 169 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 407m, avg 408m) for 169 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in 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": 406.80000000000001136868377216160297393798828125,
    "avg_distance_m": 408.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 168.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 10132,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T00:38:33+00:00",
        "end": "2026-07-19T03:27:25+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "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 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 169 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 407m, avg 408m) for 169 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in 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": 406.6000000000000227373675443232059478759765625,
    "avg_distance_m": 408.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 381,
    "overlap_duration_s": 22861,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-18T22:16:42+00:00",
        "end": "2026-07-19T04:37:43+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 381 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 407m, avg 408m) for 381 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in 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": 406.6000000000000227373675443232059478759765625,
    "avg_distance_m": 408.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 381,
    "overlap_duration_s": 22861,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
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    },
    "time_window": {
        "start": "2026-07-18T22:16:42+00:00",
        "end": "2026-07-19T04:37:43+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "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 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 381 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 407m, avg 408m) for 381 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396.19999999999998863131622783839702606201171875,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-07-18T22:30:32+00:00",
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    "last_point": {
        "ts": "2026-07-19T05:06:46+00:00",
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}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 396.19999999999998863131622783839702606201171875,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-07-18T22:30:32+00:00",
        "lat": 46.62192329999999884648786974139511585235595703125,
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    "last_point": {
        "ts": "2026-07-19T05:06:46+00:00",
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{
    "radius_m": 2.29999999999999982236431605997495353221893310546875,
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    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 396.19999999999998863131622783839702606201171875,
    "points": 93,
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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": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 408.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 377,
    "overlap_duration_s": 22620,
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    "speed_summary": {
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    },
    "time_window": {
        "start": "2026-07-18T21:29:42+00:00",
        "end": "2026-07-19T03:46:42+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
            "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 \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 406m, avg 409m) 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": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 408.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 377,
    "overlap_duration_s": 22620,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T21:29:42+00:00",
        "end": "2026-07-19T03:46:42+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "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 409m"
            },
            "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 \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 406m, avg 409m) 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."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 395.3999999999999772626324556767940521240234375,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-07-18T21:52:22+00:00",
        "lat": 46.62191169999999829087755642831325531005859375,
        "lon": 142.768691700000005084802978672087192535400390625
    },
    "last_point": {
        "ts": "2026-07-19T04:27:44+00:00",
        "lat": 46.6219449999999966394170769490301609039306640625,
        "lon": 142.76866000000001122316461987793445587158203125
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 395.3999999999999772626324556767940521240234375,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-07-18T21:52:22+00:00",
        "lat": 46.62191169999999829087755642831325531005859375,
        "lon": 142.768691700000005084802978672087192535400390625
    },
    "last_point": {
        "ts": "2026-07-19T04:27:44+00:00",
        "lat": 46.6219449999999966394170769490301609039306640625,
        "lon": 142.76866000000001122316461987793445587158203125
    }
}

{
    "radius_m": 2.5,
    "duration_minutes": 395.3999999999999772626324556767940521240234375,
    "points": 95,
    "centroid": {
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        "lon": 142.76867503368401912666740827262401580810546875
    },
    "bbox": {
        "min_lat": 46.62191169999999829087755642831325531005859375,
        "min_lon": 142.768648299999995288089849054813385009765625,
        "max_lat": 46.6219516999999967765688779763877391815185546875,
        "max_lon": 142.768695000000008121787686832249164581298828125
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    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 2.5,
    "duration_minutes": 395.3999999999999772626324556767940521240234375,
    "points": 95,
    "centroid": {
        "lat": 46.6219314978947494410022045485675334930419921875,
        "lon": 142.76867503368401912666740827262401580810546875
    },
    "bbox": {
        "min_lat": 46.62191169999999829087755642831325531005859375,
        "min_lon": 142.768648299999995288089849054813385009765625,
        "max_lat": 46.6219516999999967765688779763877391815185546875,
        "max_lon": 142.768695000000008121787686832249164581298828125
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    "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": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 408.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 382,
    "overlap_duration_s": 22919,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T20:14:43+00:00",
        "end": "2026-07-19T02:36:42+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
            "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 \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 406m, avg 409m) 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."
    }
}

{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 408.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 382,
    "overlap_duration_s": 22919,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T20:14:43+00:00",
        "end": "2026-07-19T02:36:42+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "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 409m"
            },
            "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 \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 406m, avg 409m) 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."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 92,
    "first_point": {
        "ts": "2026-07-18T20:54:51+00:00",
        "lat": 46.62191500000000132786226458847522735595703125,
        "lon": 142.76866999999998597559169866144657135009765625
    },
    "last_point": {
        "ts": "2026-07-19T03:27:25+00:00",
        "lat": 46.62193669999999912079147179611027240753173828125,
        "lon": 142.768671699999998736529960297048091888427734375
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 92,
    "first_point": {
        "ts": "2026-07-18T20:54:51+00:00",
        "lat": 46.62191500000000132786226458847522735595703125,
        "lon": 142.76866999999998597559169866144657135009765625
    },
    "last_point": {
        "ts": "2026-07-19T03:27:25+00:00",
        "lat": 46.62193669999999912079147179611027240753173828125,
        "lon": 142.768671699999998736529960297048091888427734375
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}

{
    "radius_m": 3.5,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 92,
    "centroid": {
        "lat": 46.62193000434783840546515421010553836822509765625,
        "lon": 142.768676504347666877947631292045116424560546875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768648299999995288089849054813385009765625,
        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.768695000000008121787686832249164581298828125
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.5,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 92,
    "centroid": {
        "lat": 46.62193000434783840546515421010553836822509765625,
        "lon": 142.768676504347666877947631292045116424560546875
    },
    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768648299999995288089849054813385009765625,
        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.768695000000008121787686832249164581298828125
    },
    "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": 405.3999999999999772626324556767940521240234375,
    "avg_distance_m": 408.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 271.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 16272,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T19:45:31+00:00",
        "end": "2026-07-19T00:16:43+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 405m, avg 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 271 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 405m, avg 409m) for 271 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": 405.3999999999999772626324556767940521240234375,
    "avg_distance_m": 408.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 271.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 16272,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T19:45:31+00:00",
        "end": "2026-07-19T00:16:43+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 405m, avg 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 271 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 405m, avg 409m) for 271 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": 399.1000000000000227373675443232059478759765625,
    "points_in_zone": 91,
    "first_point": {
        "ts": "2026-07-18T19:50:51+00:00",
        "lat": 46.621908300000001190710463561117649078369140625,
        "lon": 142.76866000000001122316461987793445587158203125
    },
    "last_point": {
        "ts": "2026-07-19T02:29:55+00:00",
        "lat": 46.62193669999999912079147179611027240753173828125,
        "lon": 142.768666700000011360316420905292034149169921875
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
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    "radius_m": 3.29999999999999982236431605997495353221893310546875,
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{
    "vessel_a": {
        "mmsi": 273439180,
        "imo": 8930744,
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        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
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        "start": "2026-07-18T18:32:42+00:00",
        "end": "2026-07-19T00:56:43+00:00"
    },
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        "vessel_a": 40,
        "vessel_b": 40
    },
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    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
            "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 \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
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    }
}

{
    "vessel_a": {
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        "imo": 9084401,
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        "flag": "Russia"
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    "score": {
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                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
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                "max": 25,
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            },
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                "detail": "Isolation data not available"
            },
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{
    "zone_id": "russia_prigorodnoye",
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{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
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{
    "vessel_a": {
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    },
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        "end": "2026-07-18T23:34:42+00:00"
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        "vessel_b": 41
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    "score": {
        "value": 75,
        "components": {
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                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 380 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "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"
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}

{
    "vessel_a": {
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                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
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                "score": 25,
                "max": 25,
                "detail": "Duration 380 minutes"
            },
            "speed_stability": {
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                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
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                "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 406m, avg 409m) for 380 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."
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}

{
    "zone_id": "russia_prigorodnoye",
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{
    "vessel_a": {
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        "components": {
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                "detail": "Min distance 406m, avg 409m"
            },
            "duration": {
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                "max": 25,
                "detail": "Duration 379 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
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                "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 406m, avg 409m) for 379 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": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 409,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 378.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22737,
    "speed_a_avg": 0,
    "speed_a_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T16:32:44+00:00",
        "end": "2026-07-18T22:51:41+00:00"
    },
    "points_count": {
        "vessel_a": 41,
        "vessel_b": 41
    },
    "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 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 379 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 406m, avg 409m) for 379 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": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-07-18T16:50:58+00:00",
        "lat": 46.62193169999999753372321720235049724578857421875,
        "lon": 142.76866830000000163636286742985248565673828125
    },
    "last_point": {
        "ts": "2026-07-18T23:28:12+00:00",
        "lat": 46.62193169999999753372321720235049724578857421875,
        "lon": 142.7686850000000049476511776447296142578125
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-07-18T16:50:58+00:00",
        "lat": 46.62193169999999753372321720235049724578857421875,
        "lon": 142.76866830000000163636286742985248565673828125
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    "last_point": {
        "ts": "2026-07-18T23:28:12+00:00",
        "lat": 46.62193169999999753372321720235049724578857421875,
        "lon": 142.7686850000000049476511776447296142578125
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}

{
    "radius_m": 3.5,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 82,
    "centroid": {
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        "lon": 142.7686768280487967786029912531375885009765625
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    "bbox": {
        "min_lat": 46.6218999999999965666575008071959018707275390625,
        "min_lon": 142.768646700000005012043402530252933502197265625,
        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.768695000000008121787686832249164581298828125
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    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.5,
    "duration_minutes": 397.19999999999998863131622783839702606201171875,
    "points": 82,
    "centroid": {
        "lat": 46.6219248560975785267146420665085315704345703125,
        "lon": 142.7686768280487967786029912531375885009765625
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        "min_lat": 46.6218999999999965666575008071959018707275390625,
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        "max_lon": 142.768695000000008121787686832249164581298828125
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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": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 409,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 386,
    "overlap_duration_s": 23159,
    "speed_a_avg": 0,
    "speed_a_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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        "vessel_b": {
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            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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    },
    "time_window": {
        "start": "2026-07-18T15:50:43+00:00",
        "end": "2026-07-18T22:16:42+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 406m, avg 409m"
            },
            "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 \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 406m, avg 409m) 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": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 405.69999999999998863131622783839702606201171875,
    "avg_distance_m": 409,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 386,
    "overlap_duration_s": 23159,
    "speed_a_avg": 0,
    "speed_a_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T15:50:43+00:00",
        "end": "2026-07-18T22:16:42+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "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 409m"
            },
            "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 \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 406m, avg 409m) 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": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-07-18T15:51:18+00:00",
        "lat": 46.62193669999999912079147179611027240753173828125,
        "lon": 142.768696699999992461016518063843250274658203125
    },
    "last_point": {
        "ts": "2026-07-18T22:25:41+00:00",
        "lat": 46.62192830000000043355612433515489101409912109375,
        "lon": 142.768676699999986112743499688804149627685546875
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-07-18T15:51:18+00:00",
        "lat": 46.62193669999999912079147179611027240753173828125,
        "lon": 142.768696699999992461016518063843250274658203125
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    "last_point": {
        "ts": "2026-07-18T22:25:41+00:00",
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{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
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    "bbox": {
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        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.76870500000001129592419601976871490478515625
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}

{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 394.3999999999999772626324556767940521240234375,
    "points": 82,
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        "lon": 142.768677967073159607025445438921451568603515625
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        "min_lat": 46.6218999999999965666575008071959018707275390625,
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        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.76870500000001129592419601976871490478515625
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    "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": 407,
    "avg_distance_m": 408.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1,
    "duration_minutes": 383.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23037,
    "speed_a_avg": 0,
    "speed_a_std": 0,
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    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
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            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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    },
    "time_window": {
        "start": "2026-07-18T14:56:42+00:00",
        "end": "2026-07-18T21:20:39+00:00"
    },
    "points_count": {
        "vessel_a": 38,
        "vessel_b": 38
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 409m"
            },
            "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 \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 407m, avg 409m) 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": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 407,
    "avg_distance_m": 408.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1,
    "duration_minutes": 383.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23037,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
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    },
    "time_window": {
        "start": "2026-07-18T14:56:42+00:00",
        "end": "2026-07-18T21:20:39+00:00"
    },
    "points_count": {
        "vessel_a": 38,
        "vessel_b": 38
    },
    "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 409m"
            },
            "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 \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 407m, avg 409m) 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",
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    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
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        "lat": 46.6219516999999967765688779763877391815185546875,
        "lon": 142.768678300000004810499376617372035980224609375
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}

{
    "zone_id": "russia_prigorodnoye",
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    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-07-18T14:51:17+00:00",
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        "lon": 142.768686699999989286880008876323699951171875
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{
    "radius_m": 3.5,
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{
    "radius_m": 3.5,
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        "min_lat": 46.6218982999999980165739543735980987548828125,
        "min_lon": 142.768646700000005012043402530252933502197265625,
        "max_lat": 46.62195669999999836363713257014751434326171875,
        "max_lon": 142.768708299999985911199473775923252105712890625
    },
    "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": 407.8999999999999772626324556767940521240234375,
    "avg_distance_m": 409.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 160.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9610,
    "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": "2026-07-18T12:32:06+00:00",
        "end": "2026-07-18T15:12:16+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 408m, avg 409m"
            },
            "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 408m, avg 409m) 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."
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 407.8999999999999772626324556767940521240234375,
    "avg_distance_m": 409.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 160.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9610,
    "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": "2026-07-18T12:32:06+00:00",
        "end": "2026-07-18T15:12:16+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "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 409m"
            },
            "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 408m, avg 409m) 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."
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-18T12:32:06+00:00",
        "lat": 46.62193500000000057070792536251246929168701171875,
        "lon": 142.7686899999999923238647170364856719970703125
    },
    "last_point": {
        "ts": "2026-07-18T19:00:59+00:00",
        "lat": 46.62192329999999884648786974139511585235595703125,
        "lon": 142.768675000000001773514668457210063934326171875
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-18T12:32:06+00:00",
        "lat": 46.62193500000000057070792536251246929168701171875,
        "lon": 142.7686899999999923238647170364856719970703125
    },
    "last_point": {
        "ts": "2026-07-18T19:00:59+00:00",
        "lat": 46.62192329999999884648786974139511585235595703125,
        "lon": 142.768675000000001773514668457210063934326171875
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}

{
    "radius_m": 3.20000000000000017763568394002504646778106689453125,
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    "points": 62,
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        "lon": 142.768681774193510136683471500873565673828125
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        "min_lat": 46.6218982999999980165739543735980987548828125,
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        "max_lat": 46.6219449999999966394170769490301609039306640625,
        "max_lon": 142.768708299999985911199473775923252105712890625
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    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.20000000000000017763568394002504646778106689453125,
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    "points": 62,
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        "lon": 142.768681774193510136683471500873565673828125
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        "min_lat": 46.6218982999999980165739543735980987548828125,
        "min_lon": 142.76866169999999556239345110952854156494140625,
        "max_lat": 46.6219449999999966394170769490301609039306640625,
        "max_lon": 142.768708299999985911199473775923252105712890625
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    "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": 407.30000000000001136868377216160297393798828125,
    "avg_distance_m": 408.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1,
    "duration_minutes": 346,
    "overlap_duration_s": 20760,
    "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": "2026-07-18T11:58:42+00:00",
        "end": "2026-07-18T17:44:42+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 346 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 407m, avg 409m) for 346 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": 407.30000000000001136868377216160297393798828125,
    "avg_distance_m": 408.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1,
    "duration_minutes": 346,
    "overlap_duration_s": 20760,
    "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": "2026-07-18T11:58:42+00:00",
        "end": "2026-07-18T17:44:42+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "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 409m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 346 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 407m, avg 409m) for 346 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": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-07-18T11:55:26+00:00",
        "lat": 46.6219516999999967765688779763877391815185546875,
        "lon": 142.7686850000000049476511776447296142578125
    },
    "last_point": {
        "ts": "2026-07-18T18:29:50+00:00",
        "lat": 46.62194000000000215777617995627224445343017578125,
        "lon": 142.768691700000005084802978672087192535400390625
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}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-07-18T11:55:26+00:00",
        "lat": 46.6219516999999967765688779763877391815185546875,
        "lon": 142.7686850000000049476511776447296142578125
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        "ts": "2026-07-18T18:29:50+00:00",
        "lat": 46.62194000000000215777617995627224445343017578125,
        "lon": 142.768691700000005084802978672087192535400390625
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}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 394.3999999999999772626324556767940521240234375,
    "points": 65,
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        "lon": 142.7686809230768858469673432409763336181640625
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    "bbox": {
        "min_lat": 46.6218982999999980165739543735980987548828125,
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        "max_lat": 46.6219516999999967765688779763877391815185546875,
        "max_lon": 142.768708299999985911199473775923252105712890625
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    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 394.3999999999999772626324556767940521240234375,
    "points": 65,
    "centroid": {
        "lat": 46.6219286676923303502917406149208545684814453125,
        "lon": 142.7686809230768858469673432409763336181640625
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    "bbox": {
        "min_lat": 46.6218982999999980165739543735980987548828125,
        "min_lon": 142.768651699999992388256941922008991241455078125,
        "max_lat": 46.6219516999999967765688779763877391815185546875,
        "max_lon": 142.768708299999985911199473775923252105712890625
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    "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": 407.30000000000001136868377216160297393798828125,
    "avg_distance_m": 408.5,
    "distance_consistency_m": 1,
    "duration_minutes": 379,
    "overlap_duration_s": 22739,
    "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": "2026-07-18T10:55:43+00:00",
        "end": "2026-07-18T17:14:42+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 407m, avg 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 379 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 407m, avg 408m) for 379 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": 407.30000000000001136868377216160297393798828125,
    "avg_distance_m": 408.5,
    "distance_consistency_m": 1,
    "duration_minutes": 379,
    "overlap_duration_s": 22739,
    "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": "2026-07-18T10:55:43+00:00",
        "end": "2026-07-18T17:14:42+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "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 408m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 379 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 407m, avg 408m) for 379 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": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-07-18T10:53:45+00:00",
        "lat": 46.62192830000000043355612433515489101409912109375,
        "lon": 142.768666700000011360316420905292034149169921875
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    "last_point": {
        "ts": "2026-07-18T17:20:39+00:00",
        "lat": 46.62193169999999753372321720235049724578857421875,
        "lon": 142.768675000000001773514668457210063934326171875
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}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-07-18T10:53:45+00:00",
        "lat": 46.62192830000000043355612433515489101409912109375,
        "lon": 142.768666700000011360316420905292034149169921875
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{
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{
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        "lon": 142.768678300000004810499376617372035980224609375
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396.80000000000001136868377216160297393798828125,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-07-18T06:00:55+00:00",
        "lat": 46.6502167000000014240868040360510349273681640625,
        "lon": 142.72266669999999066931195557117462158203125
    },
    "last_point": {
        "ts": "2026-07-18T12:37:45+00:00",
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        "lon": 142.768678300000004810499376617372035980224609375
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}

{
    "vessel_a": {
        "mmsi": 273356770,
        "imo": 8603638,
        "name": "PHOENIX II",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 14.9000000000000003552713678800500929355621337890625,
    "distance_consistency_m": 3,
    "duration_minutes": 93,
    "overlap_duration_s": 5581,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T05:39:04+00:00",
        "end": "2026-07-18T07:12:05+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 15m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PHOENIX II and AZOV) maintained close proximity (min 11m, avg 15m) for 93 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": 273356770,
        "imo": 8603638,
        "name": "PHOENIX II",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 14.9000000000000003552713678800500929355621337890625,
    "distance_consistency_m": 3,
    "duration_minutes": 93,
    "overlap_duration_s": 5581,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T05:39:04+00:00",
        "end": "2026-07-18T07:12:05+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 15m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PHOENIX II and AZOV) maintained close proximity (min 11m, avg 15m) for 93 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": 396.19999999999998863131622783839702606201171875,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-07-18T05:51:16+00:00",
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        "lon": 142.7226167000000032203388400375843048095703125
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        "ts": "2026-07-18T12:27:26+00:00",
        "lat": 46.62193500000000057070792536251246929168701171875,
        "lon": 142.768683299999992186712916009128093719482421875
    }
}

{
    "zone_id": "russia_prigorodnoye",
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    "dwell_minutes": 396.19999999999998863131622783839702606201171875,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-07-18T05:51:16+00:00",
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        "lon": 142.7226167000000032203388400375843048095703125
    },
    "last_point": {
        "ts": "2026-07-18T12:27:26+00:00",
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}

{
    "radius_m": 33.60000000000000142108547152020037174224853515625,
    "duration_minutes": 122.5,
    "points": 33,
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}

{
    "radius_m": 33.60000000000000142108547152020037174224853515625,
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}