NMEA 2000 PGN Decoder

Parse the 29-bit CAN identifier and decode 15+ common PGNs (heading, GPS, wind, engine, tanks, environment).

N2K frame (CAN ID + payload, in hex)

First 4 bytes are the 29-bit CAN identifier (big-endian), remaining bytes are the data payload.

Reference: PGNs this tool fully decodes

PGN	Name
127250	Vessel Heading
127251	Rate of Turn
127257	Attitude
127258	Magnetic Variation
127488	Engine Parameters — Rapid Update
127489	Engine Parameters — Dynamic
127505	Fluid Level
128259	Speed (water-referenced)
128267	Water Depth
129025	Position — Rapid Update
129026	COG & SOG — Rapid Update
129029	GNSS Position Data
130306	Wind Data
130310	Environmental Parameters (legacy)
130311	Environmental Parameters

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