Question 36 GLI04 - Mate of LT 500-1600 GRT

The Correct Answer is A. ### Explanation for Option A (Correct Answer) Option A, **"one short blast"**, is the correct signal of agreement when the vessel being overtaken concurs with the overtaking vessel's intention to pass on its starboard (right) side. Under the International Regulations for Preventing Collisions at Sea (COLREGs) Annex I (Inland Rules, specific to U.S. Inland Waters, if the vessel is operating under the Inland Rules): * The overtaking vessel initiates the maneuver by sounding one short blast (indicating "I intend to pass you on your starboard side"). * The vessel being overtaken signals its agreement to the maneuver by sounding **one short blast**. This signal confirms that the vessel understands the intention and agrees to facilitate the passage to the starboard side. *** ### Explanation for Incorrect Options **B) one prolonged, one short, one prolonged, and one short blast in that order (Prolonged-Short-Prolonged-Short)** This signal is the **Danger Signal** (or the vessel's intention is not understood) under the Inland Rules, and is used to express doubt or disagreement with an approaching vessel's intentions. It is not the signal for agreement. **C) two prolonged blasts** A prolonged blast is typically 4 to 6 seconds long. Two prolonged blasts together do not constitute an established agreement signal for an overtaking maneuver under the rules. A prolonged blast is often used as a warning or maneuvering signal (e.g., leaving a dock). **D) two prolonged followed by two short blasts** This sequence of blasts is used in restricted visibility (Rule 35) by vessels towing or pushing. It is not the signal used to agree to be overtaken in sight. (Note: The general agreement signal, if the overtaking vessel had proposed passing on the port side, would be two short blasts; this combination of prolonged and short blasts is incorrect for agreement.)