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        "notes": "Preview available for manual review"
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        "notes": "Preview available for manual review"
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                "detail": "Min distance 252m, avg 254m"
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            "duration": {
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                "detail": "Duration 93 minutes"
            },
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                "detail": "both nearly stationary; very stable speeds"
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                "score": 5,
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                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
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    "vessel_a": {
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        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
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    "min_distance_m": 252.400000000000005684341886080801486968994140625,
    "avg_distance_m": 254.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 93.2999999999999971578290569595992565155029296875,
    "overlap_duration_s": 5599,
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    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
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            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-06T23:45:50+00:00",
        "end": "2026-09-07T01:19:09+00:00"
    },
    "points_count": {
        "vessel_a": 37,
        "vessel_b": 37
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 252m, avg 254m"
            },
            "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 \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 252m, avg 254m) 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_prigorodnoye",
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{
    "zone_id": "russia_sakhalin_south",
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{
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{
    "radius_m": 34.2999999999999971578290569595992565155029296875,
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{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
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            "max_sog": 0
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    },
    "time_window": {
        "start": "2026-09-06T22:35:31+00:00",
        "end": "2026-09-06T23:28:26+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 254m, avg 255m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 53 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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        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 254m, avg 255m) for 53 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."
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}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
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    },
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        "mmsi": 273439180,
        "imo": 8930744,
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        "start": "2026-09-06T22:35:31+00:00",
        "end": "2026-09-06T23:28:26+00:00"
    },
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        "vessel_a": 20,
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    "zone_id": "russia_sakhalin_south",
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    "score": {
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        "components": {
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                "max": 25,
                "detail": "Min distance 254m, avg 255m"
            },
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                "max": 25,
                "detail": "Duration 53 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "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 254m, avg 255m) for 53 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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{
    "zone_id": "russia_sakhalin_south",
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{
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{
    "radius_m": 27.60000000000000142108547152020037174224853515625,
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{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
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        "vessel_b": {
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    },
    "time_window": {
        "start": "2026-09-06T21:18:33+00:00",
        "end": "2026-09-06T22:11:53+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 252m, avg 255m"
            },
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                "max": 25,
                "detail": "Duration 53 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "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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        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 252m, avg 255m) for 53 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."
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}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
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    },
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                "max": 25,
                "detail": "Min distance 252m, avg 255m"
            },
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                "max": 25,
                "detail": "Duration 53 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
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                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
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                "score": 5,
                "max": 5,
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        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 252m, avg 255m) for 53 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_sakhalin_south",
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{
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{
    "radius_m": 27.5,
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{
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            "avg_sog": 0,
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    },
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        "start": "2026-09-06T20:09:16+00:00",
        "end": "2026-09-06T21:02:17+00:00"
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    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
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    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 70,
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                "score": 15,
                "max": 25,
                "detail": "Min distance 253m, avg 254m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 53 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
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                "score": 15,
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                "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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        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 253m, avg 254m) for 53 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."
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        "status": "inconclusive",
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        },
        "searched_at": "2026-09-07T02:45:04.302095+00:00",
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        "notes": "Preview available for manual review"
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{
    "vessel_a": {
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                "detail": "Min distance 253m, avg 254m"
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                "detail": "both nearly stationary; very stable speeds"
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                "score": 5,
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        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 253m, avg 254m) for 53 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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        "searched_at": "2026-09-07T02:45:09.297019+00:00",
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{
    "vessel_a": {
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                "detail": "Min distance 252m, avg 254m"
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            },
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                "score": 5,
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    "vessel_a": {
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}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 260.19999999999998863131622783839702606201171875,
    "avg_distance_m": 261.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 54,
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    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
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            "max_sog": 0
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        "vessel_b": {
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            "max_sog": 0
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    },
    "time_window": {
        "start": "2026-09-05T23:05:35+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
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    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 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 260m, avg 262m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
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            "end_ts": "2026-09-05T23:59:36+00:00"
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        "searched_at": "2026-09-06T05:45:07.360808+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
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        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
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    "min_distance_m": 260.19999999999998863131622783839702606201171875,
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    "duration_minutes": 54,
    "overlap_duration_s": 3241,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
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            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
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    },
    "time_window": {
        "start": "2026-09-05T23:05:35+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
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    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
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        "components": {
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                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
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                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
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                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
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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: Sakhalin South Approach"
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        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 260m, avg 262m) for 54 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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            "end_ts": "2026-09-05T23:59:36+00:00"
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        "searched_at": "2026-09-06T05:45:10.083248+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
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{
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{
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{
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{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
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    "min_distance_m": 7.9000000000000003552713678800500929355621337890625,
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    "duration_minutes": 39.39999999999999857891452847979962825775146484375,
    "overlap_duration_s": 2362,
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    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
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            "max_sog": 0
        },
        "vessel_b": {
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            "max_sog": 0
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    },
    "time_window": {
        "start": "2026-09-05T23:01:33+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 11m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 39 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 8m, avg 11m) for 39 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
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            "end_ts": "2026-09-05T23:40:55+00:00"
        },
        "searched_at": "2026-09-06T06:00:04.762544+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
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    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
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    "min_distance_m": 7.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 10.9000000000000003552713678800500929355621337890625,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 39.39999999999999857891452847979962825775146484375,
    "overlap_duration_s": 2362,
    "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
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    },
    "time_window": {
        "start": "2026-09-05T23:01:33+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 11m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 39 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 8m, avg 11m) for 39 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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    "sar": {
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            "end_ts": "2026-09-05T23:40:55+00:00"
        },
        "searched_at": "2026-09-06T06:00:07.357843+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 5.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 10.5999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 96.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 5768,
    "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": "2026-09-05T22:04:47+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 37,
        "vessel_b": 37
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 11m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 96 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 6m, avg 11m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62402999999999764213498565368354320526123046875,
            "lon": 142.76913020000000642539816908538341522216796875
        },
        "time_window": {
            "start_ts": "2026-09-05T22:04:47+00:00",
            "end_ts": "2026-09-05T23:40:55+00:00"
        },
        "searched_at": "2026-09-06T04:45:12.828295+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 5.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 10.5999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 96.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 5768,
    "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": "2026-09-05T22:04:47+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 37,
        "vessel_b": 37
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 11m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 96 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 6m, avg 11m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62402999999999764213498565368354320526123046875,
            "lon": 142.76913020000000642539816908538341522216796875
        },
        "time_window": {
            "start_ts": "2026-09-05T22:04:47+00:00",
            "end_ts": "2026-09-05T23:40:55+00:00"
        },
        "searched_at": "2026-09-06T04:45:15.252497+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 260.19999999999998863131622783839702606201171875,
    "avg_distance_m": 261.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 114.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 6889,
    "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": "2026-09-05T22:04:47+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 115 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 260m, avg 262m) for 115 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.624566799999996646874933503568172454833984375,
            "lon": 142.767643099999986588954925537109375
        },
        "time_window": {
            "start_ts": "2026-09-05T22:04:47+00:00",
            "end_ts": "2026-09-05T23:59:36+00:00"
        },
        "searched_at": "2026-09-06T05:00:01.909207+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 260.19999999999998863131622783839702606201171875,
    "avg_distance_m": 261.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 114.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 6889,
    "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": "2026-09-05T22:04:47+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 115 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": "High-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 260m, avg 262m) for 115 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.624566799999996646874933503568172454833984375,
            "lon": 142.767643099999986588954925537109375
        },
        "time_window": {
            "start_ts": "2026-09-05T22:04:47+00:00",
            "end_ts": "2026-09-05T23:59:36+00:00"
        },
        "searched_at": "2026-09-06T05:00:04.708876+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 392,
    "points_in_zone": 158,
    "first_point": {
        "ts": "2026-09-05T22:02:45+00:00",
        "lat": 46.6240082999999998492057784460484981536865234375,
        "lon": 142.769116700000012087912182323634624481201171875
    },
    "last_point": {
        "ts": "2026-09-06T04:34:47+00:00",
        "lat": 46.623656699999997954364516772329807281494140625,
        "lon": 142.769508300000012468444765545427799224853515625
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 392,
    "points_in_zone": 158,
    "first_point": {
        "ts": "2026-09-05T22:02:45+00:00",
        "lat": 46.6240082999999998492057784460484981536865234375,
        "lon": 142.769116700000012087912182323634624481201171875
    },
    "last_point": {
        "ts": "2026-09-06T04:34:47+00:00",
        "lat": 46.623656699999997954364516772329807281494140625,
        "lon": 142.769508300000012468444765545427799224853515625
    }
}

{
    "radius_m": 84,
    "duration_minutes": 392,
    "points": 158,
    "centroid": {
        "lat": 46.62398358734176184725583880208432674407958984375,
        "lon": 142.769132870886124919707071967422962188720703125
    },
    "bbox": {
        "min_lat": 46.623656699999997954364516772329807281494140625,
        "min_lon": 142.768865000000005238689482212066650390625,
        "max_lat": 46.62442329999999657275111530907452106475830078125,
        "max_lon": 142.770025000000003956301952712237834930419921875
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 84,
    "duration_minutes": 392,
    "points": 158,
    "centroid": {
        "lat": 46.62398358734176184725583880208432674407958984375,
        "lon": 142.769132870886124919707071967422962188720703125
    },
    "bbox": {
        "min_lat": 46.623656699999997954364516772329807281494140625,
        "min_lon": 142.768865000000005238689482212066650390625,
        "max_lat": 46.62442329999999657275111530907452106475830078125,
        "max_lon": 142.770025000000003956301952712237834930419921875
    },
    "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": 260.19999999999998863131622783839702606201171875,
    "avg_distance_m": 261.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1,
    "duration_minutes": 176.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10566,
    "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": "2026-09-05T21:03:30+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 68,
        "vessel_b": 68
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 176 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 260m, avg 262m) for 176 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.624566299999997909253579564392566680908203125,
            "lon": 142.76764120000001412336132489144802093505859375
        },
        "time_window": {
            "start_ts": "2026-09-05T21:03:30+00:00",
            "end_ts": "2026-09-05T23:59:36+00:00"
        },
        "searched_at": "2026-09-06T03:45:08.515063+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273439180,
        "imo": 8930744,
        "name": "ZAPRAVSHCHIK 05",
        "flag": "Russia"
    },
    "min_distance_m": 260.19999999999998863131622783839702606201171875,
    "avg_distance_m": 261.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1,
    "duration_minutes": 176.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10566,
    "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": "2026-09-05T21:03:30+00:00",
        "end": "2026-09-05T23:59:36+00:00"
    },
    "points_count": {
        "vessel_a": 68,
        "vessel_b": 68
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 262m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 176 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": "High-confidence STS candidate. Two tankers (AZOV and ZAPRAVSHCHIK 05) maintained close proximity (min 260m, avg 262m) for 176 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.624566299999997909253579564392566680908203125,
            "lon": 142.76764120000001412336132489144802093505859375
        },
        "time_window": {
            "start_ts": "2026-09-05T21:03:30+00:00",
            "end_ts": "2026-09-05T23:59:36+00:00"
        },
        "searched_at": "2026-09-06T03:45:11.129853+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 5.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 10.5,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 160.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 9621,
    "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": "2026-09-05T21:00:34+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 61,
        "vessel_b": 61
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 10m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 6m, avg 10m) 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": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 5.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 10.5,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 160.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 9621,
    "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": "2026-09-05T21:00:34+00:00",
        "end": "2026-09-05T23:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 61,
        "vessel_b": 61
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 10m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 6m, avg 10m) 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": 396.80000000000001136868377216160297393798828125,
    "points_in_zone": 159,
    "first_point": {
        "ts": "2026-09-05T21:51:45+00:00",
        "lat": 46.6240082999999998492057784460484981536865234375,
        "lon": 142.769113299999986566035659052431583404541015625
    },
    "last_point": {
        "ts": "2026-09-06T04:28:33+00:00",
        "lat": 46.62395500000000225782059715129435062408447265625,
        "lon": 142.769231700000005957917892374098300933837890625
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396.80000000000001136868377216160297393798828125,
    "points_in_zone": 159,
    "first_point": {
        "ts": "2026-09-05T21:51:45+00:00",
        "lat": 46.6240082999999998492057784460484981536865234375,
        "lon": 142.769113299999986566035659052431583404541015625
    },
    "last_point": {
        "ts": "2026-09-06T04:28:33+00:00",
        "lat": 46.62395500000000225782059715129435062408447265625,
        "lon": 142.769231700000005957917892374098300933837890625
    }
}

{
    "radius_m": 37.7000000000000028421709430404007434844970703125,
    "duration_minutes": 396.80000000000001136868377216160297393798828125,
    "points": 159,
    "centroid": {
        "lat": 46.62398307232704297575764940120279788970947265625,
        "lon": 142.769124697484357966459356248378753662109375
    },
    "bbox": {
        "min_lat": 46.6237617000000028610884328372776508331298828125,
        "min_lon": 142.768865000000005238689482212066650390625,
        "max_lat": 46.62429670000000214713509194552898406982421875,
        "max_lon": 142.769481700000000046202330850064754486083984375
    },
    "zone_id": "russia_prigorodnoye"
}

{
    "radius_m": 37.7000000000000028421709430404007434844970703125,
    "duration_minutes": 396.80000000000001136868377216160297393798828125,
    "points": 159,
    "centroid": {
        "lat": 46.62398307232704297575764940120279788970947265625,
        "lon": 142.769124697484357966459356248378753662109375
    },
    "bbox": {
        "min_lat": 46.6237617000000028610884328372776508331298828125,
        "min_lon": 142.768865000000005238689482212066650390625,
        "max_lat": 46.62429670000000214713509194552898406982421875,
        "max_lon": 142.769481700000000046202330850064754486083984375
    },
    "zone_id": "russia_sakhalin_south"
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 13.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 31.300000000000000710542735760100185871124267578125,
    "overlap_duration_s": 1876,
    "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": "2026-09-05T20:03:00+00:00",
        "end": "2026-09-05T20:34:16+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 13m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 31 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 11m, avg 13m) for 31 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62403580000000147265382111072540283203125,
            "lon": 142.76912210000000413856469094753265380859375
        },
        "time_window": {
            "start_ts": "2026-09-05T20:03:00+00:00",
            "end_ts": "2026-09-05T20:34:16+00:00"
        },
        "searched_at": "2026-09-06T03:00:08.106985+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "vessel_a": {
        "mmsi": 273456730,
        "imo": 9084401,
        "name": "AZOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273443820,
        "imo": 8135215,
        "name": "FLAGMAN",
        "flag": "Russia"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 13.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 31.300000000000000710542735760100185871124267578125,
    "overlap_duration_s": 1876,
    "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": "2026-09-05T20:03:00+00:00",
        "end": "2026-09-05T20:34:16+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 13m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 31 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AZOV and FLAGMAN) maintained close proximity (min 11m, avg 13m) for 31 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.62403580000000147265382111072540283203125,
            "lon": 142.76912210000000413856469094753265380859375
        },
        "time_window": {
            "start_ts": "2026-09-05T20:03:00+00:00",
            "end_ts": "2026-09-05T20:34:16+00:00"
        },
        "searched_at": "2026-09-06T03:00:10.810331+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 398.19999999999998863131622783839702606201171875,
    "points_in_zone": 156,
    "first_point": {
        "ts": "2026-09-05T20:51:28+00:00",
        "lat": 46.6239800000000030877345125190913677215576171875,
        "lon": 142.769136699999990014475770294666290283203125
    },
    "last_point": {
        "ts": "2026-09-06T03:29:43+00:00",
        "lat": 46.62393999999999749661583337001502513885498046875,
        "lon": 142.76925829999998995845089666545391082763671875
    }
}

{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 398.19999999999998863131622783839702606201171875,
    "points_in_zone": 156,
    "first_point": {
        "ts": "2026-09-05T20:51:28+00:00",
        "lat": 46.6239800000000030877345125190913677215576171875,
        "lon": 142.769136699999990014475770294666290283203125
    },
    "last_point": {
        "ts": "2026-09-06T03:29:43+00:00",
        "lat": 46.62393999999999749661583337001502513885498046875,
        "lon": 142.76925829999998995845089666545391082763671875
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}