Question 6 GLI03 - Master-LT 500-1600 GRT

The Correct Answer is A **Why Option A is Correct:** This scenario is governed by the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 9(e)(i) concerning Narrow Channels. This rule dictates the signaling procedure when an overtaking vessel intends to pass on the port side of the vessel ahead, and crucially, when the vessel ahead is required to take action to permit safe passing. Rule 34(c) prescribes the required signal: "An overtaking vessel shall, in accordance with Rule 9(e)(i), indicate her intention by the following signals: two prolonged blasts followed by one short blast to mean 'I intend to overtake you on your starboard side'; **two prolonged blasts followed by two short blasts to mean 'I intend to overtake you on your port side'.**" Since the intention is to overtake on the port side, the correct signal is sounding two prolonged blasts followed by two short blasts. **Why the Other Options are Incorrect:** * **B) Sound two prolonged blasts on the whistle:** This signal, consisting only of two prolonged blasts, is the standard warning signal given when a vessel is approaching a bend or an area where other vessels may be obscured (Rule 34(e)). It does not specifically communicate the intention to overtake on the port side in a narrow channel. * **C) No signal is necessary:** Signaling is explicitly required under Rule 9(e)(i) and Rule 34(c) when the overtaking vessel requires the vessel ahead to take action to permit safe passing in a narrow channel. Failing to signal would violate COLREGs and create a dangerous situation. * **D) Sound two short blasts:** Two short blasts signifies "I am altering my course to port" (Rule 34(a)(ii)). While this is a maneuvering signal, it does not convey the comprehensive message required for initiating an overtaking maneuver in a narrow channel according to Rule 34(c), which necessitates the use of the prolonged blast sequence.