Celestial Navigation · Navigational Triangle
The side of the navigational triangle between the elevated pole and the observer's zenith is the:
- AZenith distance
- BHour angle
- CPolar distance
- DCo-latitude (90° − latitude)✓ Correct
Explanation
Pole-to-zenith is the co-latitude (90° − L). Pole-to-body is the polar distance (90° − declination), and zenith-to-body is the zenith distance (90° − altitude).
Authority: Bowditch (Pub. No. 9), the navigational triangle
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