Question 34 MODU01 - Offshore Installation Manager

The Correct Answer is A. A tugboat displaying the shape shown in illustration D010RR – which is an **all-around white diamond shape** – is indicating that it has a tow that **exceeds 200 meters in length**. This signal is mandated by both the International Regulations for Preventing Collisions at Sea (COLREGs, Rule 24(a)(ii)) and Inland Navigation Rules for a power-driven vessel when towing, provided the length of the tow measured from the stern of the towing vessel to the after end of the tow exceeds 200 meters. This shape must be exhibited where it can best be seen. **Why other options are incorrect:** * **B) Has a tow that is carrying hazardous cargo:** While vessels carrying dangerous goods must comply with specific rules and might display other signals (like the 'B' flag or lights/shapes related to restricted maneuverability if applicable), the white diamond shape is exclusively associated with the length of the tow, not the nature of the cargo. * **C) Is at anchor:** A vessel at anchor displays specific day shapes: a black ball or, if less than 50 meters, none might be required (Inland). A vessel over 100 meters must use a cylinder (or similar structure) instead of a ball forward. The diamond shape is never used to indicate anchoring. * **D) Is not under command:** A vessel not under command (NUC) displays two vertical black balls. The diamond shape is only used to indicate the length of the tow.