INTERNATIONAL ONLY You are operating a vessel in a narrow channel. Your vessel must stay within the channel to be navigated safely. Another vessel is crossing your course from starboard to port, and you are in doubt as to his intentions. According to Rule 9, which statement is TRUE?

Correct Answer: Option C — You may sound the danger signal

Rule 9(d) of the COLREGS states that a vessel in a narrow channel shall not impede the passage of a vessel that can only navigate within the channel. If in doubt of the other vessel's intentions, Rule 34(d) permits the use of the danger signal.