Abbreviations | Help
Please see below used abbreviations and their long word or explanation.
| Abbreviation | Explanation |
|---|---|
| AWA | Apparent Wind Angle. |
| AWS | Apparent Wind Speed. |
| BTW | Bearing to Waypoint. This will only be updated if navigational data (PGN 129284) is transmitted, typically together with cross track error (PGN 129283). |
| COG | Course over Ground calculated via GNSS. |
| CPA | Closest Point of Approach. |
| DTW | Distance to Waypoint. This will only be updated if navigational data (PGN 129284) is transmitted, typically together with cross track error (PGN 129283). |
| GLONASS | GPS stands for Global Navigation Satellite System and is provided by Russia. |
| GNSS | GNSS stands for Global Navigation Satellite System. It refers to any satellite constellation that provides global positioning, navigation, and timing services like GPS (USA), GLONASS (Russia), BeiDou (China) or Galileo (Europe). |
| GPS | GPS stands for Global Position System and is provided by USA. |
| HDG | Heading. |
| MMSI | Maritime Mobile Service Identity. |
| ROT | Rate of Turn. |
| SOG | Speed over ground calculated via GNSS. Difference between STW and SOG shows current. If SOG greater than STW the current is with the boat. If STW greater than SOG the current is against the boat. |
| STW | Speed through Water. Difference between STW and SOG shows current. If SOG greater than STW the current is with the boat. If STW greater than SOG the current is against the boat. |
| TCPA | Time to Closest Point of Approach. |
| TWA | True Wind Angle. |
| TWD | True Wind Direction. |
| TWS | True Wind Speed. |
| VMC | Velocity Made Good on Course. Formula is VMC = SOG * cos(COG - BTW). This will only be updated if navigational data (PGN 129284) is transmitted, typically together with cross track error (PGN 129283). |
| XTE | Cross Track Error. This will only be updated if cross track error (PGN 129283) is transmitted, typically together with navigational data (PGN 129284). |