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, you signal your agreement by sounding __________.

Correct Answer: Option D — one prolonged, one short, one prolonged, and one short blast in that order

Rule 34(c)(ii) requires the overtaken vessel in International waters, when acting in agreement, to signal concurrence by sounding the Morse signal Charlie (one prolonged, one short, one prolonged, one short) using its whistle or light signal.