Celestial Navigation · Hour Angle — LHA
The GHA of the sun is 200°00' and you are at longitude 75°00'W. What is the local hour angle (LHA)?
- A025°00'
- B275°00'
- C150°00'
- D125°00'✓ Correct
Explanation
LHA = GHA − west longitude (or GHA + east longitude). 200°00' − 75°00' = 125°00'. If the result were negative or over 360°, add or subtract 360°.
Authority: Nautical Almanac; Bowditch (Pub. No. 9), local hour angle
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