Question 10 GLI01 - Master-Unlimited Tonnage

The Correct Answer is B **Explanation for Option B (Correct Answer):** This scenario is governed by the International Regulations for Preventing Collisions at Sea (COLREGS) Rule 13 (Overtaking) and Rule 17 (Action by Stand-on Vessel). 1. **Rule 13 (Overtaking):** Vessel "A" is the overtaking vessel (the vessel wishing to pass) and is therefore the **Give-way vessel**. Vessel "B" is the vessel being overtaken and is therefore the **Stand-on vessel**. Rule 13(d) states that no subsequent alteration of the bearing between the two vessels shall make the overtaking vessel a crossing vessel or relieve her of the duty of keeping clear until she is finally past and clear. 2. **Rule 17 (Action by Stand-on Vessel):** This rule dictates the action of the vessel which is required to keep her course and speed. The stand-on vessel (Vessel B) must initially **hold her course and speed** to allow the give-way vessel (Vessel A) to take effective action to pass safely and keep clear. Therefore, Vessel "B" must hold her course and speed. **Explanation of Incorrect Options:** * **A) should slow down until vessel "A" has passed:** This is incorrect. Changing speed (slowing down) violates Rule 17, which requires the stand-on vessel to maintain course and speed. Changing speed makes it harder for the give-way vessel (A) to accurately judge the passing maneuver. * **C) may steer various courses and vessel "A" must keep clear:** This is incorrect. While vessel "A" must keep clear, vessel "B" (the stand-on vessel) is specifically required by Rule 17 to maintain a steady course and speed. Steerage various courses would confuse the situation and increase collision risk. * **D) should change course to the right:** This is incorrect. Vessel "B" is the stand-on vessel and must maintain course and speed. Changing course (especially unnecessarily to the right) would interfere with Vessel "A's" required maneuver to keep clear.