{"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/tahti_baseline_route", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "tahti-loop", "name": "F/V T\u00c4HTI Hanko coastal loop (legitimate)", "mmsi": 230199540}, "geometry": {"type": "LineString", "coordinates": [[22.972, 59.823], [22.974, 59.816], [22.99, 59.79], [23.02, 59.77], [22.98, 59.78], [22.965, 59.795], [22.97, 59.818], [22.972, 59.823]]}}]}