{"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_venla_research_track", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "s6-venla-research-track", "name": "M/V VENLA RESEARCH lawn-mower survey grid (DECOY)", "mmsi": 230888011, "decoy": true, "timestamps": ["2025-10-15T09:50:00.000000Z", "2025-10-15T09:58:00.000000Z", "2025-10-15T10:06:00.000000Z", "2025-10-15T10:14:00.000000Z", "2025-10-15T10:22:00.000000Z", "2025-10-15T10:30:00.000000Z", "2025-10-15T10:40:00.000000Z"]}, "geometry": {"type": "LineString", "coordinates": [[24.54, 59.895], [24.55, 59.905], [24.56, 59.895], [24.57, 59.905], [24.58, 59.895], [24.59, 59.905], [24.6, 59.895]]}}]}