Question 1999Navigation General

70% to pass

What does the term "tide" refer to?

A Mixing tendency of the water
B Vertical movement of the water
C Horizontal movement of the water
D Salinity content of the water
AI Explanation

The correct answer is B) Vertical movement of the water. The term "tide" refers to the regular, periodic rise and fall of the water level caused by the gravitational pull of the moon and sun. This vertical movement of the water is a key component of tidal phenomena, which is critical knowledge for mariners, including those seeking a US Coast Guard Captain's License. The other answer choices are incorrect because they do not accurately describe the definition of "tide." Option A refers to water mixing, option C refers to horizontal water movement, and option D refers to water salinity, none of which are the primary meaning of the term "tide" in the context of a Captain's License examination.

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