ATROTOS

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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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            "notes": "No Sentinel-1 scenes covering corridor and time window"
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        "viirs": {
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}

{
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    "zone_id": "discovered_004",
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{
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{
    "zone_id": "discovered_004",
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{
    "zone_id": "discovered_004",
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{
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{
    "zone_id": "discovered_004",
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{
    "zone_id": "discovered_004",
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    "points_in_zone": 76,
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{
    "zone_id": "discovered_004",
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    "points_in_zone": 84,
    "first_point": {
        "ts": "2026-07-16T16:30:20+00:00",
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        "lon": 3.29751670000000007831886250642128288745880126953125
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{
    "zone_id": "discovered_004",
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    "dwell_minutes": 392,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-07-16T15:51:48+00:00",
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{
    "vessel_a": {
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        "flag": "Marshall Is"
    },
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        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
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    "speed_summary": {
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        "start": "2026-07-16T14:10:05+00:00",
        "end": "2026-07-16T14:42:56+00:00"
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    "points_count": {
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        "vessel_b": 3
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    "zone_id": "discovered_004",
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    "score": {
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        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 35m, avg 40m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
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        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ATROTOS and NORTHERN OSPREY) maintained close proximity (min 35m, avg 40m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
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            "end_ts": "2026-07-16T14:42:56+00:00"
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        "searched_at": "2026-07-16T15:00:02.138492+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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{
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{
    "vessel_a": {
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    "vessel_b": {
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    "time_window": {
        "start": "2026-07-16T10:00:21+00:00",
        "end": "2026-07-16T10:39:24+00:00"
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    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
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        "components": {
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                "score": 25,
                "max": 25,
                "detail": "Min distance 29m, avg 39m"
            },
            "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 \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 29m, avg 39m) 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 English Channel Surveillance Zone, a known STS activity area."
    },
    "sar": {
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            "end_ts": "2026-07-16T10:39:24+00:00"
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        "searched_at": "2026-07-16T14:00:02.028293+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
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{
    "vessel_a": {
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                "max": 25,
                "detail": "Min distance 12m, avg 32m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 209 minutes"
            },
            "speed_stability": {
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                "detail": "both nearly stationary; very stable speeds"
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                "score": 15,
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                "detail": "Isolation data not available"
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            "context": {
                "score": 5,
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                "detail": "In monitored zone: English Channel Surveillance Zone"
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        "summary": "High-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 12m, avg 32m) for 209 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 English Channel Surveillance Zone, a known STS activity area."
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                "detail": "Min distance 22m, avg 121m"
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                "max": 25,
                "detail": "Duration 45 minutes"
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                "detail": "In monitored zone: English Channel Surveillance Zone"
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