Celestial navigation glossary
Local hour angle (LHA)
The GP’s angle west of your meridian: GHA plus east longitude, or minus west.
Where the course teaches it
LHA: the hour angle from your meridian, 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.
- Assumed position (AP)
- A position near the DR chosen to give whole degrees of latitude and LHA, to enter the tables.