INTERNATIONAL ONLY You are underway in a narrow channel, and you are being overtaken by a vessel astern. After the overtaking vessel sounds the proper signal indicating his intention to pass your vessel on your starboard side, which signal would you sound to indicate your agreement?

Correct Answer: Option A — One prolonged, one short, one prolonged, and one short blast

COLREGS Rule 9(g) requires a vessel being overtaken in a narrow channel to sound one prolonged, one short, one prolonged, and one short blast to signify agreement with the overtaking vessel's intent. This signal alerts the overtaking vessel that the maneuver is understood and safe to proceed.