Question 1511Navigation General70% to pass
Zenith distance is equal to _______________.
AI Explanation
The correct answer is A) 90° - Ho.
Zenith distance is the angular distance between the zenith (the point directly overhead) and the celestial body being observed. It is calculated as 90° minus the body's altitude (Ho), which is the angular height of the celestial body above the horizon.
The other options are incorrect because:
B) Ho° + d is the total correction to be applied to the sextant altitude to obtain the true altitude.
C) 90° - z is the body's altitude (Ho), not the zenith distance.
D) 90° - d is the body's altitude (Ho), not the zenith distance.
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