Question 34 MODU02 - Barge Supervisor

The Correct Answer is A. **Explanation for A (Correct Option):** The shape shown in illustration D010RR is a diamond shape, or a black diamond (one vertical diamond shape). According to the Convention on the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 24 (Towing and Pushing), a vessel engaged in towing and the vessel being towed, when the length of the tow (measured from the stern of the towing vessel to the after end of the towed vessel) exceeds 200 meters, must display a diamond shape where it can best be seen. This signal is required under both International and Inland Rules. **Explanation for B (Incorrect Option):** The shape displayed (a diamond) signifies the length of the tow. Carrying hazardous cargo does not require the display of this specific day shape under COLREGs. Vessels carrying dangerous goods have specific marking requirements (like placards or signals indicating explosives, etc.), but not the diamond shape. **Explanation for C (Incorrect Option):** A vessel that is at anchor must display a black ball shape (or two black balls if exceeding 50 meters in length) during the day. The diamond shape is exclusively reserved for towing operations where the tow exceeds 200 meters. **Explanation for D (Incorrect Option):** A vessel that is Not Under Command (NUC) must display two black balls, one above the other, during the day. The diamond shape is not used to signify a vessel that is not under command.