Question 242Navigation General

70% to pass

The period of a lighted aid to navigation refers to the _______________.

A length of time between flashes of the light
B date of construction or establishment
C time required for the light to complete each cycle
D time required for the longest flash of each cycle
AI Explanation

The correct answer is C) the time required for the light to complete each cycle. The period of a lighted aid to navigation refers to the time it takes for the light to complete one full cycle of flashing, from the start of one flash to the start of the next identical flash. This cycle time is a key characteristic that helps mariners identify and interpret the light signal. The other answer choices are incorrect because they do not accurately describe the definition of the period of a lighted aid. The length of time between flashes (A), the date of construction (B), and the time of the longest flash (D) are not the definition of the period.

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