Celestial navigation glossary
Local apparent noon (LAN)
The moment the Sun crosses your meridian and reaches its highest altitude of the day.
Where the course teaches it
Watch the Sun cross your meridian, in the module Latitude from the noon Sun. Know when noon is by your watch, and work a complete noon sight for your latitude.
Taught alongside it
- Zenith distance (z)
- 90° minus the altitude: the angle from straight overhead, and the distance to the GP.