Question 6

The Correct Answer is A ### Explanation of Correct Option **Option A) Sound two prolonged followed by two short blasts** is correct because this is the specific signal required under the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 34(c)(i), when a vessel intends to overtake another vessel in a narrow channel on the other vessel's **port side**, and that vessel must take action to permit safe passing (as required by Rule 9(e)(i)). * **Two prolonged blasts** indicate the vessel is requesting assistance/permission to overtake in the narrow channel. * **Two short blasts** specifically indicate the intention is to pass on the **port side** of the vessel being overtaken. ### Explanation of Incorrect Options **Option B) Sound two prolonged blasts on the whistle** This signal (two prolonged blasts) is not specified as an overtaking signal under Rule 34. A single prolonged blast is used as a warning signal or when approaching a bend in a channel where other vessels may be obscured (Rule 34(e)). **Option C) No signal is necessary** This is incorrect. When operating in a narrow channel where the vessel being overtaken must assent or take action to permit passing, Rule 34(c) strictly mandates signaling the intent to overtake. **Option D) Sound two short blasts** Under Rule 34(a)(ii) (Inland and International), two short blasts means "I intend to alter my course to port." This is a maneuvering signal to indicate a change of direction, not the required intent signal for overtaking in a narrow channel.