Question 31 UFV02 - Mate - Uninspected Fishing Vessels

The Correct Answer is C **Explanation for Option C (Correct Answer):** The illustration D010RR depicts a vessel displaying a specific arrangement of day shapes: a diamond shape positioned above a triangle shape (apex downward). This combination of shapes is prescribed by the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 24 ("Towing and Pushing"). Rule 24(a)(ii) mandates that a power-driven vessel when towing, where the length of the tow (measured from the stern of the towing vessel to the after end of the tow) exceeds 200 meters, shall exhibit **a diamond shape** where it can best be seen. Although the image shows two shapes, it is critical to recognize the primary shape that signifies a long tow in COLREGs: the diamond. Vessels engaged in towing (regardless of length) must also exhibit the basic shapes for a power-driven vessel underway (no shapes unless towing or restricted in ability to maneuver, etc.). However, if the illustration is intended to represent the specific day signal for a long tow (as is standard in navigation tests), the presence of the diamond shape makes Option C the only correct choice based on COLREGs Rule 24. (Note: Sometimes test illustrations might include other general shapes for a power-driven vessel or R.A.M. vessel, but the diamond is the specific indicator for a tow exceeding 200 meters). **Explanation of Incorrect Options:** **A) Is at anchor:** A vessel at anchor displays a single ball shape where it can best be seen (Rule 30). The combination shown (diamond and triangle) does not signify being at anchor. **B) Is not under command:** A vessel not under command (NUC) displays two ball shapes in a vertical line (Rule 27). The arrangement shown (diamond and triangle) is not the signal for NUC. **D) Has a tow that is carrying hazardous cargo:** There is no specific day shape prescribed in COLREGs solely for a tow carrying hazardous cargo. Vessels carrying dangerous goods generally comply with flag state requirements or international codes (like the IMO International Maritime Dangerous Goods Code), but these do not involve the diamond and triangle shapes for indicating the cargo type. The shapes shown strictly indicate the length of the tow.