Question 6 GLI05 - Master or Mate of LT 200 GRT

The Correct Answer is A **Explanation of A (Sound two prolonged followed by two short blasts):** This scenario is governed by the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 9(e)(i) concerning narrow channels. Rule 9(e)(i) states that in a narrow channel, a vessel intending to overtake another vessel (which can only safely be overtaken if the vessel to be overtaken takes action to permit safe passing) shall indicate its intention by sounding the following signals: * **Two prolonged blasts followed by one short blast:** If intending to overtake on the starboard side of the vessel ahead. * **Two prolonged blasts followed by two short blasts:** If intending to overtake on the **port side** of the vessel ahead. Since the intention is to overtake on the **port side**, the correct signal is two prolonged blasts followed by two short blasts. This signal requests permission from the vessel ahead to perform the maneuver. **Why the other options are incorrect:** * **B) Sound two prolonged blasts on the whistle:** Two prolonged blasts is the correct signal used in restricted visibility (Rule 35) by a power-driven vessel underway but stopped and making no way. It is not the signal prescribed by Rule 9 for requesting permission to overtake in a narrow channel on the port side. * **C) No signal is necessary:** Rule 9(e)(i) specifically mandates the use of sound signals in this particular scenario (narrow channel overtaking that requires the vessel ahead to take action). Therefore, a signal is necessary. * **D) Sound two short blasts:** Two short blasts is a maneuvering signal indicating that the vessel is altering its course to port (Rule 34(a)(ii)). While it is part of the sequence needed for the overtaking maneuver, it is not the complete signal required by Rule 9(e)(i) to request permission to overtake on the port side.