Question 359 Rules of the Road

90% to pass

INLAND ONLY When power-driven vessels are crossing, what does a signal of one short blast by either vessel mean?

A "I am altering course to starboard"
B "I intend to change course to starboard"
C "I intend to leave you on my port side"
D "I intend to hold course and speed"
AI Explanation

The correct answer is C) "I intend to leave you on my port side". According to the Inland Navigation Rules, a signal of one short blast by a power-driven vessel indicates that the vessel intends to leave the other vessel on its port side. This is the standard communication between vessels when they are crossing, allowing the other vessel to anticipate the intended course of action. The other answer choices are incorrect because: A) and B) refer to altering or changing course to starboard, which is not the meaning of a single short blast signal; and D) "I intend to hold course and speed" is not the correct interpretation of the one short blast signal.

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