When plotting a circle of equal altitude for a high altitude sight, the radius of the circle is determined by the formula __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — 90° - Ho
Per Bowditch celestial navigation standards, the radius of a circle of equal altitude for high-altitude sights is the polar distance from the body's geographical position, expressed mathematically as 90° minus observed altitude (Ho).
100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.