Question 34

The Correct Answer is A. A tugboat displaying the shape shown in illustration D010RR (a black 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)(i) (Towing and Pushing), which requires a vessel when towing and the length of the tow exceeds 200 meters to exhibit a diamond shape where it can best be seen. **Why the other options are incorrect:** B) **Has a tow that is carrying hazardous cargo:** There is no specific visual day signal (shape) under COLREGs to indicate that a tow is carrying hazardous cargo. Special lights or shapes are reserved for specific maneuvering status or characteristics (e.g., restricted in ability to maneuver, dredging, towing length, etc.). C) **Is at anchor:** A vessel at anchor displays a single black ball where it can best be seen (COLREGs Rule 30). D) **Is not under command:** A vessel not under command displays two vertical black balls where they can best be seen (COLREGs Rule 27(a)(i)).