Celestial navigation glossary
Assumed position (AP)
A position near the DR chosen to give whole degrees of latitude and LHA, to enter the tables.
Where the course teaches it
The assumed position, in the module The assumed position and LHA. Choose the assumed position the tables need, and find LHA for any body.
Taught alongside it
- Celestial meridian
- The hour circle through your zenith; LHA is measured west from it.
- Local hour angle (LHA)
- The GP’s angle west of your meridian: GHA plus east longitude, or minus west.