Question 10
OSV01BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown in illustration D017RR below. Vessel "B" should do which of the following?

AI Explanation
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), specifically Rule 13 (Overtaking) and Rule 17 (Action by Stand-on Vessel).
1. **Overtaking Situation (Rule 13):** Vessel "A" is the overtaking vessel (the give-way vessel), and vessel "B" is the vessel being overtaken (the stand-on vessel). The rule states that any vessel overtaking another shall keep out of the way of the vessel being overtaken.
2. **Action by Stand-on Vessel (Rule 17):** In situations where one vessel is required to keep out of the way (the give-way vessel), the other vessel (the stand-on vessel, which is Vessel "B") is required to **keep her course and speed**. This ensures that the give-way vessel (Vessel "A") can accurately predict the stand-on vessel's movement and take timely, effective action to pass safely.
Therefore, Vessel "B" should hold her course and speed.
**Explanation of Incorrect Options:**
* **A) should slow down until vessel "A" has passed:** This is incorrect. Vessel "B" is the stand-on vessel and must maintain course and speed. Slowing down would confuse the give-way vessel ("A") and violate Rule 17, potentially creating a dangerous close-quarters situation.
* **C) may steer various courses and vessel "A" must keep clear:** This is incorrect. The stand-on vessel's duty is to maintain a predictable course and speed. Steering "various courses" would make it impossible for vessel "A" to keep clear effectively and is explicitly forbidden by Rule 17. (Rule 17(a)(ii) allows the stand-on vessel to act only if the give-way vessel's action alone is insufficient.)
* **D) should change course to the right:** This is incorrect. Changing course is an action reserved for the give-way vessel (Vessel "A"). Vessel "B" must maintain course and speed unless collision cannot be avoided by the action of vessel "A" alone (Rule 17(b)).
Related Questions
#9 Your vessel is steering course 149°psc, variation for the area is 13°E, and deviation is 4°E. The wind is from the northeast, producing a 4° leeway. What true course are you making good?#9 On 18 May your 1030 ZT DR position is LAT 18°30'N, LONG 62°31'W. You are on course 286°T, speed 24
knots. Determine your 1200 position using the following observations of the Sun.