Celestial Navigation · Hour Angle — GHA of a Star
If GHA Aries is 100°00' and a star's SHA is 50°00', the star's GHA is:
- A350°00'
- B50°00'
- C150°00'✓ Correct
- D200°00'
Explanation
GHA of a star = GHA Aries + SHA = 100° + 50° = 150°. SHA (sidereal hour angle) measures the star's position west of Aries and changes only slowly.
Authority: Nautical Almanac, daily pages
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