| NMEA Code | Full Name | Description |
|---|
| BWC | Bearing and Distance to Waypoint | Provides bearing and distance from current position to a destination waypoint |
| DSC | Digital Selective Calling | Used for VHF radio distress and safety communications |
| DSE | Dead Reckoning | Estimated position based on course and speed from last known position |
| GGA | Global Positioning System Fix Data | Essential GPS data including position, time, fix quality, and satellite info |
| GLL | Geographic Position - Latitude/Longitude | Basic latitude and longitude position data |
| GSA | GPS DOP and Active Satellites | Satellite information including dilution of precision and active satellites |
| GSV | GPS Satellites in View | Detailed information about GPS satellites in view |
| HDG | Heading - Deviation & Variation | Magnetic heading with deviation and variation corrections |
| HDM | Heading - Magnetic | Magnetic compass heading |
| HDT | Heading - True | True compass heading (corrected for magnetic variation) |
| RMC | Recommended Minimum | Essential navigation data including position, speed, course, and time |
| VHW | Water Speed and Heading | Speed through water and heading information |
| VTG | Track Made Good and Ground Speed | Course and speed over ground |
| DPT | Depth | Water depth measurement |
| DBT | Depth Below Transducer | Depth measured from the transducer location |
| MTW | Mean Temperature of Water | Water temperature reading |
| VWR | Relative Wind Speed and Angle | Wind speed and direction relative to the vessel |
| VWT | True Wind Speed and Angle | Actual wind speed and direction (corrected for vessel movement) |
| TLL | Target Latitude and Longitude | Position data for tracked targets (like AIS contacts) |
| WPL | Waypoint Location | Stored waypoint position data |
| RTE | Routes | Route information with waypoint sequences |
