BOTH INTERNATIONAL & INLAND You are underway in a narrow channel and are being overtaken by a vessel astern. The overtaking vessel sounds a signal indicating her intention to pass you on your starboard side. If such an action appears dangerous, you should sound __________.

Correct Answer: Option B — five short and rapid blasts

Rule 34(d) of the International and Inland Navigation Rules specifies that if an overtaking vessel's proposed maneuver appears dangerous, the overtaken vessel must indicate doubt by sounding the danger signal of five or more short and rapid blasts.