If voy sail, Nautical Reference is for you.
The best nautical reference ever created!
Complete and easy to use, contains information about:
- International Code of Signals
- Beaufort/Douglas scale
- Azimuth to quadrant bearing conversion
- Azimuth to back azimuth conversion
- Compass calculator: variation, deviation, course, bearing, heading, leeway.
USA Inland and International rules.
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