Work in progress on sailing library

content/sail-library/instruments/_index.md

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+---
+title: Instruments
+date: 2021-05-23
+type: book
+weight: 1
+---

content/sail-library/instruments/abbreviations.md

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+---
+title: "Abbreviations"
+summary: "Making sense of TWA, AWA, TWD, BS etc etc."
+date: 2021-05-23T20:08:17+02:00
+type: book
+------
+# Sailing Instruments
+
+
+
+| Abbreviation  | Technical name | Description |
+|---------------|----------------|-------------|
+| AWA | Apparent Wind Angle | Wind angle as seen onboard the boat
+| AWS | Apparent Wind Speed | Wind speed as seen onboard the boat
+| TWA | True Wind Angle | Wind angle compensated for the movement of the boat
+| TWS | True Wind Speed | Wind speed compensated for the movement of the boat
+| TWD | True Wind Direction | The magnetic orientation of the wind over ground |
+| GWD | Ground Wind Direction | The magnetic orientation of the wind (Same as TWD) |
+| BS  | Boat Speed | Speed of the hull through the water |
+| VS  | Velocity (Speed) | Speed of the hull through the water (Same as BS) | 
+| SOG | Speed Over Ground | Speed from the GPS sensor |
+| HDG | Heading | Magnetic orientation of the bow. |
+| COG | Course Over Ground | GPS direction the boat is moving | 
+| VMG | Velocity Made Good | How fast the is boat moving towards (or away) the direction of the wind. 
+| CMG | Course Made Good |  How fast the boat is moving towards the waypoint. 
+| DTG | Distance To Go | Distance to next waypoint |
+| DTM | Distance To Mark | Distance to next mark (Same as DTG) |
+| TTG | Time To Go | Time to reach next waypoint 
+| TTM | Time To Mark | Time to reach next mark (Same as TTG) |