Question 31

The Correct Answer is C **Explanation for Option C (Correct Answer):** The shape shown in illustration D010RR is a **diamond shape**. According to both the International Regulations for Preventing Collisions at Sea (COLREGs) Rule 24 (Towing and Pushing) and the U.S. Inland Rules equivalent, a vessel engaged in towing that has a tow of which the length, measured from the stern of the towing vessel to the after end of the tow, **exceeds 200 meters** is required to display a **diamond shape** where it can best be seen. Therefore, a vessel displaying this shape is indicating that it has a tow that exceeds 200 meters in length. **Explanation for Incorrect Options:** **A) Is at anchor:** A vessel at anchor displays a **ball** shape forward (or two balls for vessels over 50 meters). It does not display a diamond shape. **B) Is not under command:** A vessel not under command (NUC) displays **two balls** in a vertical line where they can best be seen. It does not display a diamond shape. **D) Has a tow that is carrying hazardous cargo:** While vessels carrying hazardous cargo may have specific marking requirements, the regulations concerning the shapes required by COLREGs/Inland Rules for towing vessels do not mandate the use of the diamond shape specifically for hazardous cargo; the diamond shape is mandated solely based on the length of the tow.