Question 6 ONC06 - Master LT 100 GRT

The Correct Answer is A **Explanation for Option A (Correct):** The scenario describes an action taken by a power-driven vessel intending to overtake another power-driven vessel in a narrow channel. This action is governed by Rule 9(e)(i) of the International Regulations for Preventing Collisions at Sea (COLREGs). According to Rule 9(e)(i), if a vessel intends to overtake another vessel (and the overtaken vessel is required to take action to permit safe passing), the overtaking vessel must indicate its intention by sounding the appropriate maneuvering signals. The signal for "I intend to overtake you on your port side" is **two prolonged blasts followed by two short blasts**. **Explanation for Other Options (Incorrect):** * **B) Sound two prolonged blasts on the whistle:** This signal has no standard meaning under COLREGs Rule 34 for maneuvering or warning, and certainly does not specifically indicate the intention to overtake on the port side. (A single prolonged blast is the warning signal used when approaching a bend or leaving a berth.) * **C) No signal is necessary:** This is incorrect. Rule 9(e) explicitly mandates the use of sound signals in a narrow channel when overtaking and requiring the vessel ahead to take action to facilitate the passing. Sound signals are essential for communicating intentions and ensuring safety. * **D) Sound two short blasts:** This signal means "I am altering my course to starboard" (Rule 34(a)(i)). While the vessel might eventually alter course to port to complete the pass, the initial intention signal for overtaking on the port side is the specific sequence required by Rule 9(e)(i), which is two prolonged followed by two short blasts.