INTERNATIONAL ONLY In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded during which of the following situations?

Correct Answer: Option C — A vessel overtaking in a narrow channel

Rule 9(e)(i) mandates that in a narrow channel, a vessel overtaking another must indicate her intention by sounding the prescribed whistle signals. The vessel being overtaken must then indicate her agreement by sounding the appropriate signal. This exchange is mandatory to ensure safe passage in confined, restricted waters.