Question 1719Navigation General

70% to pass

The lunar day is _______________.

A shorter than a solar day
B longer than a solar day during the summer months and shorter in winter months
C longer than a solar day
D the same length as the solar day
AI Explanation

The correct answer is C) longer than a solar day. The lunar day, also known as the tidal day, is the time it takes for the moon to return to the same position in the sky as observed from a fixed point on Earth. This is approximately 24 hours and 50 minutes, which is longer than the solar day of 24 hours. The other options are incorrect because: A) The lunar day is longer, not shorter, than the solar day. B) The lunar day is consistently longer than the solar day, not variable between summer and winter months. D) The lunar day is not the same length as the solar day.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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