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Deck: Rules of the Road

Question 611 of 1,025

BOTH INTERNATIONAL & INLAND You are on vessel "A" and proceeding down a narrow channel as shown in illustration D040RR below. You can only navigate within the channel and vessel "B" is crossing so as to involve risk of collision. Which action would be most prudent?

USCG illustration D040RR for Deck Rules of the Road question 611
Illustration D040RR
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Mariner discussion

Comments from mariners who studied this question.

po polkadot2012 · Feb 18, 2015
I disagree with choice (d) for this answer. IAW Rule 9(d) "A vessel shall not cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within the channel or fairway. The latter vessel shall use the danger signal if in doubt as to the intention of the crossing vessel." It says nothing about taking evasive maneuvers. The options could be worded better.
tj tjmiller · Feb 20, 2015
I think the key to this question is "so as to involve risk of collision" which brings Rule 17a(ii),b "Action by Stand-on Vessel" into play in addition to Rule 9d.
Kr Kruser41 · Jun 4, 2015
The answer can't be to do nothing. He should not be impeding you at all, but he has already violated her responsibility by crossing so as to involve risk of collision. Therefore at this point you may take action. The prudent thing would be to sound the danger signal, and also to take evasive action in the case that he doesn't do anything.