VAYU 1

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        "end": "2026-07-29T18:10:51+00:00"
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    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 23m, avg 32m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 86 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Western Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TENDUA and VAYU 1) maintained close proximity (min 23m, avg 32m) for 86 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Western Black Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "dwell_minutes": 177,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-07-29T15:17:42+00:00",
        "lat": 31.547553300000000575664671487174928188323974609375,
        "lon": 32.337254999999998972270986996591091156005859375
    },
    "last_point": {
        "ts": "2026-07-29T18:14:41+00:00",
        "lat": 31.547421700000001010266714729368686676025390625,
        "lon": 32.33693000000000239424480241723358631134033203125
    }
}

{
    "radius_m": 27.300000000000000710542735760100185871124267578125,
    "duration_minutes": 177,
    "points": 10,
    "centroid": {
        "lat": 31.54746015999999286805177689529955387115478515625,
        "lon": 32.33698832999999694948201067745685577392578125
    },
    "bbox": {
        "min_lat": 31.5473649999999992132870829664170742034912109375,
        "min_lon": 32.3368650000000030786395655013620853424072265625,
        "max_lat": 31.547640000000001236912794411182403564453125,
        "max_lon": 32.337254999999998972270986996591091156005859375
    },
    "zone_id": "discovered_156"
}

{
    "vessel_a": {
        "mmsi": 613445600,
        "imo": 9290517,
        "name": "VAYU 1",
        "flag": "CAMEROON"
    },
    "vessel_b": {
        "mmsi": 667002199,
        "imo": 9299862,
        "name": "TENDUA",
        "flag": "Sierra Leone"
    },
    "min_distance_m": 25.89999999999999857891452847979962825775146484375,
    "avg_distance_m": 30.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 198,
    "overlap_duration_s": 11879,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-29T14:56:42+00:00",
        "end": "2026-07-29T18:14:41+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 26m, avg 31m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 198 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: Western Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VAYU 1 and TENDUA) maintained close proximity (min 26m, avg 31m) for 198 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 Western Black Sea Surveillance Zone, a known STS activity area."
    }
}

{
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "dwell_minutes": 246,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-07-29T14:08:42+00:00",
        "lat": 31.54775670000000076242940849624574184417724609375,
        "lon": 32.33746670000000023037500795908272266387939453125
    },
    "last_point": {
        "ts": "2026-07-29T18:14:41+00:00",
        "lat": 31.547421700000001010266714729368686676025390625,
        "lon": 32.33693000000000239424480241723358631134033203125
    }
}

{
    "radius_m": 47.89999999999999857891452847979962825775146484375,
    "duration_minutes": 246,
    "points": 13,
    "centroid": {
        "lat": 31.54752640769230964679081807844340801239013671875,
        "lon": 32.3370958999999942307113087736070156097412109375
    },
    "bbox": {
        "min_lat": 31.5473649999999992132870829664170742034912109375,
        "min_lon": 32.3368650000000030786395655013620853424072265625,
        "max_lat": 31.5477716999999984182068146765232086181640625,
        "max_lon": 32.33751170000000030313458410091698169708251953125
    },
    "zone_id": "discovered_156"
}

{
    "vessel_a": {
        "mmsi": 613445600,
        "imo": 9290517,
        "name": "VAYU 1",
        "flag": "CAMEROON"
    },
    "vessel_b": {
        "mmsi": 667002199,
        "imo": 9299862,
        "name": "TENDUA",
        "flag": "Sierra Leone"
    },
    "min_distance_m": 22.89999999999999857891452847979962825775146484375,
    "avg_distance_m": 29.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 3.5,
    "duration_minutes": 294,
    "overlap_duration_s": 17640,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-29T13:20:41+00:00",
        "end": "2026-07-29T18:14:41+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 23m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 294 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Western Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VAYU 1 and TENDUA) maintained close proximity (min 23m, avg 30m) for 294 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Western Black Sea Surveillance Zone, a known STS activity area."
    }
}