Auto-detect and decode 17+ NMEA 0183 sentence types with checksum validation.
Paste one or more sentences to decode them.
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Decode AIS NMEA sentences (Types 1β3 position reports and Type 5 voyage data) at the bit level.
Build a valid AIS Type 1 position report from form inputs with step-by-step encoding.
Validate or generate the XOR checksum for any NMEA 0183 sentence, with step-by-step XOR.