INTERNATIONAL ONLY In a narrow channel, an overtaking vessel which intends to pass on the other vessel's port side would sound which signal?

Correct Answer: Option A — Two prolonged followed by two short blasts

COLREG Rule 9(e)(i) dictates that an overtaking vessel in a narrow channel must signal its intent to pass. For a port-side pass, the vessel must sound two prolonged blasts followed by two short blasts, requesting the overtaken vessel to take necessary action to facilitate the maneuver.