Question 20 GLI07 - OUPV

The Correct Answer is D **Explanation for Option D (Correct):** Option D, "not impede the passage of vessel 'B'," is correct because it aligns directly with Rule 9 (Narrow Channels) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the U.S. Inland Rules. Rule 9(b) specifically states that a vessel of less than 20 meters in length, a sailing vessel, or a **vessel engaged in fishing** (like Vessel "A") shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway (like the deep-draft tanker, Vessel "B"). Vessel "B" sounding five short and rapid blasts is the danger or doubt signal (Rule 34(d)), indicating that Vessel "B" believes Vessel "A" is taking insufficient action or creating a dangerous situation, likely by being in a position that impedes the tanker's safe navigation. Vessel "A" must therefore take immediate action to ensure Vessel "B"'s passage is not impeded. **Explanation for Incorrect Options:** **A) maintain course and speed:** This is incorrect. Vessel "A" is required to not impede Vessel "B"'s passage (Rule 9(b)). Maintaining course and speed, especially after hearing the danger signal, would violate Rule 9(b) and Rule 8 (Action to Avoid Collision) and perpetuate the dangerous situation indicated by the five short blasts. **B) not answer the whistle signals from vessel "B":** This is incorrect. While the five short blasts (danger signal) do not require a specific whistle response, they demand immediate maneuvering action. Failing to take action (as required by D) based on the signal would be a dereliction of duty under the Rules. **C) sound one prolonged followed by two short blasts:** This signal (Rule 35/34(e)) is used by a vessel engaged in fishing when underway, making way, but it is not the appropriate response to the danger signal given by the impeding vessel. Vessel "A"'s primary duty here is to maneuver out of the way, not simply announce its status.