BOTH INTERNATIONAL & INLAND You are underway in a narrow channel and you are being overtaken by a vessel astern. The overtaking vessel sounds a signal indicating his intention to pass your vessel 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) mandates that if a vessel being overtaken in a narrow channel deems the passing arrangement unsafe, it shall sound five short and rapid blasts, serving as the statutory danger signal to alert the overtaking vessel of required caution.