Question 119 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND You are crossing a narrow channel in an 18meter tug when you sight a loaded tankship off your port bow coming up the channel. Which statement is correct?

A The tankship is the stand-on vessel because it is in the channel.
B The tankship is the stand-on vessel because it is the larger of the two vessels.
C You cannot impede the safe passage of the tankship.
D Neither vessel is the stand-on vessel because the tankship is crossing.
AI Explanation

The correct answer is C) You cannot impede the safe passage of the tankship. This is correct because under both the International Rules of the Road and the Inland Navigation Rules, a vessel less than 20 meters in length (the 18-meter tug) must not impede the safe passage of a vessel that is constrained by its draft, such as a loaded tankship. The tankship, being constrained by its draft, has the right-of-way in the narrow channel, and the tug must take early and substantial action to keep out of the way of the tankship. The other answer choices are incorrect because the tankship's status as the stand-on vessel is not relevant in this situation, and the relative sizes of the vessels do not determine the right-of-way when one vessel is constrained by its draft.

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