Unlike its successors, which use complex sentences to relay everything from wind speed to depth, NMEA 0180 was remarkably narrow in scope. It operated as a serial data stream, usually at a baud rate of 1200 or 4800, depending on the specific implementation. The standard actually existed in two primary formats:
By 1985, most manufacturers were transitioning to NMEA 0183. By 1990, NMEA 0180 was considered obsolete for new installations. nmea 0180