Question 1282Navigation General

70% to pass

A light, feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form, on objects whose temperatures are below freezing, is called _______________.

A dew
B frost
C glaze
D snow
AI Explanation

The correct answer is B) frost. Frost is a light, feathery deposit of ice that forms when water vapor in the air sublimates (transitions directly from a gas to a solid) onto surfaces with temperatures below freezing. This process of direct water vapor to ice crystal formation is what distinguishes frost from other forms of ice accumulation, such as dew, glaze, or snow. The other options are incorrect because: A) dew forms from the condensation of liquid water vapor, not direct sublimation; C) glaze is a sheet of ice formed by the freezing of liquid water, not sublimation; and D) snow forms from the crystallization of water vapor in the atmosphere, not on surfaces.

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