Question 17 GLI07 - OUPV

The Correct Answer is B **Explanation for Option 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) and Rule 27 (Vessels Not Under Command or Restricted in their Ability to Manoeuvre). Rule 24(e) addresses a vessel or object being towed. It states: "A vessel or object being towed shall exhibit sidelights and a stern light." Since the question asks what lights a single vessel being towed alongside shall show, it must display the lights required for a vessel being towed, which are sidelights and a stern light. *** **Why the other options are incorrect:** * **A) One all-round white light:** An all-round white light (or two/three) is typically used for anchoring (Rule 30) or by certain small vessels/fishing vessels, but it is not the standard requirement for a vessel being towed. The vessel being towed must indicate its direction to avoid collision, which requires directional lights (sidelights and stern light). * **C) A masthead light, sidelights, and a stern light:** This configuration (a masthead light, sidelights, and a stern light) is the basic requirement for a vessel **underway** and **under power** (Rule 23). A vessel being towed alongside is not considered to be underway under its own power and therefore does not show masthead lights. The vessel doing the towing displays the necessary towing lights (masthead lights or towing lights). * **D) Only the outboard sidelight and a stern light:** COLREGs Rule 24(e) requires the vessel being towed to exhibit **sidelights** (plural), meaning both the port and starboard sidelights must be shown, regardless of whether it is being towed astern or alongside.