Celestial Navigation · Hour Angle — LHA Adding 360
GHA is 40°00' and your assumed longitude is 70°00' W. What is the LHA?
- A330°00'✓ Correct
- B−30°00' (negative; 360° not yet added)
- C110°00'
- D030°00' (wrong sign on longitude)
Explanation
LHA = GHA − west longitude = 40° − 70° = −30°. A negative result is brought into range by adding 360°: −30° + 360° = 330°.
Authority: Nautical Almanac, Hour Angle
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