Celestial Navigation · Meridian Altitude — Latitude
At local apparent noon the sun's observed altitude (Ho) is 70°00' bearing due south, and its declination is N20°00'. What is your latitude?
- A40°00'N✓ Correct
- B20°00'N
- C50°00'N
- D40°00'S
Explanation
Zenith distance = 90° − 70° = 20°. The body bears south, so the zenith distance is named north (N20°). Declination is N20°; same name, so add: Latitude = 20° + 20° = 40°N.
Authority: Bowditch (Pub. No. 9), latitude by meridian altitude
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