{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s6-multi-stage-combo/s6_loiter_loop_bbox", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "s6-loiter-loop-bbox", "name": "Stage-C figure-eight bounding box (over BC/Estlink junction)", "t_start": "2025-10-15T09:10:00.000000Z", "t_end": "2025-10-15T11:05:00.000000Z"}, "geometry": {"type": "Polygon", "coordinates": [[[24.54, 59.87], [24.62, 59.87], [24.62, 59.905], [24.54, 59.905], [24.54, 59.87]]]}}]}