Question 28 RVR01 - Master of Unlimited Tonnage

The Correct Answer is D **Explanation for D (Has a tow that exceeds 200 meters in length):** The illustration D010RR shows a vessel displaying three shapes arranged vertically: a black diamond shape in the middle, with a black cylinder shape both above and below it. However, the standard shapes used to indicate a tow exceeding 200 meters are a **diamond shape** (or, alternatively, two **black cones** apex-to-apex, or in some contexts, three black shapes where the middle one is a diamond). A simpler and more universally recognized combination for a vessel restricted in its ability to maneuver (like a towing vessel) when the tow length **exceeds 200 meters** is the display of three shapes: a **black diamond** shape in the middle, with a **black ball** shape both above and below it. *Assuming the illustration D010RR depicts the required day signal for a vessel towing where the length of the tow exceeds 200 meters, which is defined by the International Regulations for Preventing Collisions at Sea (COLREGs) Rule 24(a) as a **diamond shape** (displayed where it can best be seen), Option D is the only relevant and correct interpretation regarding tow length.* (Note on visual ambiguity: If the illustration strictly shows two cylinders and a diamond, this combination is not explicitly listed in COLREGs for this purpose. However, the **diamond shape** is the definitive indicator for a tow over 200m. Given the multiple-choice context, the question intends to test knowledge of the 200m tow signal, making D the intended correct answer.) --- **Explanation for why other options are incorrect:** * **A) Has a tow that is carrying hazardous cargo:** There is no specific day signal (shape) under COLREGs used solely to indicate a tow carrying hazardous cargo. Warning signals for dangerous goods are typically defined by port authority or IMO regulations (e.g., flags or lights), not the combination of shapes related to towing length. * **B) Is at anchor:** A vessel at anchor displays a single black **ball** shape forward (and possibly a second ball aft if over 50m). The shapes shown (including a diamond) do not signify anchoring. * **C) Is not under command:** A vessel not under command (NUC) displays two black **ball** shapes arranged vertically. The display shown (including a diamond or cylinder shapes) does not signify being not under command.