Celestial navigation glossary
Amplitude
The Sun’s bearing from east or west as it rises or sets: a check of the compass.
Where the course teaches it
Where the Sun rises, in the module Checking the compass by the Sun. Find the compass error and deviation from the Sun's bearing at sunrise or sunset.
Taught alongside it
- Compass error
- True bearing minus compass bearing: variation plus deviation.
- Deviation
- Compass error caused by the boat’s own iron and electrics; it changes with heading.