Question 303Navigation General

70% to pass

A light having characteristics which include color variations is defined as _______________.

A oscillating
B fluctuating
C switching
D alternating
AI Explanation

The correct answer is D) alternating. A light with characteristics that include color variations is defined as an alternating light. According to the U.S. Coast Guard regulations, an alternating light is a light that shows different colors in a regular and pre-determined sequence. This type of light is used to provide additional visual information to mariners, such as indicating a specific navigational feature or aid. The other options are incorrect because they do not accurately describe the characteristics of a light with color variations. Oscillating and fluctuating lights refer to changes in intensity, while switching lights typically involve a single color that is turned on and off.

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