Question 17 ONC05 - Master or Mate of LT 200 GRT

The Correct Answer is B **Explanation for B (Sidelights and a stern light):** The lighting requirements for vessels being towed are governed by the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 24 (Towing and Pushing). Rule 24(f) addresses the lighting for a vessel, or object, being towed, other than those described in Rule 24(c) and 24(h). Rule 24(f)(ii) states that a vessel being towed shall exhibit: 1. **Sidelights** (Rule 23(a)(ii) modified by 24(f)(ii)). 2. **A stern light** (Rule 23(a)(iii) modified by 24(f)(ii)). The rule treats the towed vessel essentially as a power-driven vessel under way, but it is explicitly prohibited from showing masthead lights (Rule 24(f)(i)). Therefore, the vessel being towed alongside must show sidelights and a stern light. **Explanation of Incorrect Options:** * **A) One all-round white light:** This light is typically used for small vessels (under 7 meters) or anchored vessels, not a vessel being towed alongside. The towed vessel must clearly indicate its direction (via sidelights) and presence (via a stern light). * **C) A masthead light, sidelights, and a stern light:** This is the lighting configuration for a standard power-driven vessel under way (Rule 23(a)). Rule 24(f)(i) specifically states that the vessel being towed shall not exhibit masthead lights. * **D) Only the outboard sidelight and a stern light:** While the focus of collision avoidance often involves the outboard side, COLREGs Rule 24(f)(ii) requires the towed vessel to exhibit both sidelights, not just the outboard one. Both sidelights are necessary for other approaching vessels to correctly determine the course and position of the towed vessel.