Module 10 - Chartwork
Waypoints and GPS Navigation
A waypoint is a position defined by latitude and longitude, used to mark turning points or destinations on a passage. Modern GPS and chart plotters navigate between waypoints and display bearing, distance, and cross-track error.
While GPS is invaluable, you must always be able to navigate without it. Batteries fail, equipment breaks, and GPS signals can be unreliable. Chart plotters should confirm — not replace — traditional chartwork.
Key points
- Waypoint = a Lat/Long position used for navigation
- GPS gives bearing, distance, XTE (cross-track error) to waypoints
- Always have a paper chart backup
- Cross-check GPS position against visual observations
- Plot GPS positions on the paper chart regularly
Continue studying Chartwork
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