{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s4-spoofed-ais-identity/spoof_claimed_track", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "spoof-x-ais-claimed", "name": "Spoof platform X \u2014 AIS-claimed track (slow ~6 kn, claims MMSI 230199540)", "claimed_mmsi": 230199540, "claimed_type": 30}, "geometry": {"type": "LineString", "coordinates": [[24.1, 59.78], [24.18, 59.79], [24.33, 59.815], [24.62, 59.87], [24.76, 59.9], [24.88, 59.93]]}}]}