Nmea 0183 Versions [2021] -

Added support for Global Navigation Satellite Systems (GNSS) like Galileo.

Shifted to differential (RS-422) signaling and introduced mandatory checksums. nmea 0183 versions

| Version | Release Year | Key Features & Changes | | :--- | :--- | :--- | | 1.5 | 1989 | Original specification; 4800 baud; basic talker/listener model. | | 2.0 | 1992 | Introduced the GGA , GLL , RMC , VTG sentences; standardized checksums. | | 2.1 | 1994 | Added GSA and GSV for GNSS satellite data; clarified null fields. | | 2.3 | 2001 | Increased baud rate to 38400 (optional); added support for multiple talkers. | | 3.0 | 2002 | Major overhaul: added support for 115200 baud; introduced new sentences for AIS, DGPS; defined "proprietary sentences". | | 4.0 | 2008 (revised 2012) | Added support for Galileo and BeiDou; increased precision for time and position. | | 4.10 | 2012 | Added sentences for GNSS integrity, RAIM, and enhanced satellite ID schemes. | | 4.11 | 2018 (current) | Improved multi-GNSS handling; added new fields for signal-to-noise ratio (SNR) and system time offsets. | Added support for Global Navigation Satellite Systems (GNSS)

Most recent update; comprehensive revision for all modern GNSS constellations. 1. The Move to RS-422 (v1.5 to v2.0) introduced new sentences for AIS