Marine Chartplotter NMEA 0183 / Raw Voyage Log Checksum & AIS Track Surgeon

Deterministic IEC 61162-1 / NMEA 0183 8-bit XOR (*hh) checksum filter + ITU-R M.1371 AIS 6-bit ASCII armor decoder + 1024-week GPS epoch rollover corrector engine (.nmea, .log, .txt, .gpx) built for Garmin Marine, Raymarine, B&G, Navionics — zero-upload ephemeral Wasm RAM execution.

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Cloudflare Ephemeral Wasm RAM · 0% Retention

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Double-click 2.4× zoom · Drag to pan / 3D orbit

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