Global Positioning System (GPS) | A satellite tracking system. |
Heading (hea) | Compass direction on the present course. |
Knots (kt | Velocity in nautical miles per hour. |
Latitude | Angular distance North or South of the Equator. |
Lay line | Optimal line towards a waypoint based on the wind direction. |
Longitude | Angular distance West or East of the prime meridian. |
Nautical Mile | One nautical mile equals 1852 meters. |
Navigation | Traveling between two locations on a route with knowledge of |
| the current location in relation to the route. |
Position | Exact map coordinates of a given location. |
Tack | Direction of the vessel in relation to the wind. |
Tack angle difference (tad) | A change in the tack angle caused by the wind. |
Time to Lay line (ttl) | Time to reach an optimal line towards a waypoint. |
Time to Start line (tsl) | Time to reach the start line based on the current velocity |
| and location. |
Time of Sunrise (tsr) | Estimated time to sunrise based on a GPS fix. |
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