Question 6 MODU01 - Offshore Installation Manager

The Correct Answer is A ### 1. Explanation for Option A (Correct Answer) Option A is correct based on the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 34(c)(i), which governs signaling requirements for overtaking in narrow channels. **Sound two prolonged followed by two short blasts** is the mandated signal used by an overtaking vessel when: 1. They are in a narrow channel (Rule 9(e)(i)). 2. They intend to overtake the vessel ahead on the **port side**. 3. The vessel being overtaken is required to take action to permit safe passing. This signal communicates both the intention to overtake and the specific side (port) the maneuver will take place on, requiring an assent signal from the vessel being overtaken before the maneuver can commence (Rule 34(c)(ii)). ### 2. Explanation of Why Other Options Are Incorrect **B) Sound two prolonged blasts on the whistle** This signal is not prescribed for indicating an intention to overtake. Prolonged blasts are typically used as sound signals in restricted visibility (Rule 35) or as a general warning signal (Rule 34(d)). **C) No signal is necessary** This is incorrect. When overtaking in a narrow channel requires the assent of the vessel ahead (i.e., they must take action), specific signaling is mandatory under COLREGs Rule 34(c)(i) to initiate the dialogue and confirm intentions. **D) Sound two short blasts** Under COLREGs Rule 34(a), two short blasts means "I am altering my course to port." While the vessel will turn to port to conduct the maneuver, this signal only describes the helm movement, not the full intention to overtake on the port side in a narrow channel, which requires the longer, specific signaling sequence defined in Rule 34(c).