Question 32

The Correct Answer is A. ### Explanation for Option A (Correct Answer) Option A, **not under command**, is correct because the illustration D084RR depicts a vessel exhibiting **two all-round red lights displayed vertically** where they can best be seen. According to both the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 27(a), and Inland Rules, Rule 27(a), a vessel that is **not under command (NUC)**—meaning she is unable to maneuver as required by the Rules and is, therefore, unable to keep out of the way of another vessel—must exhibit two such all-round red lights. When underway, this vessel must also exhibit sidelights and a sternlight. ### Explanation of Incorrect Options **B) showing improper lights:** This is incorrect. The lights shown (two vertical all-round red lights) are the *prescribed* and *proper* lights for a vessel that is not under command, as defined by the Rules. **C) dredging:** This is incorrect. A vessel engaged in dredging or underwater operations (restricted in her ability to maneuver, or RAM) exhibits three vertical all-round lights: Red-White-Red. The illustration shows only two all-round red lights. **D) towing:** This is incorrect. A power-driven vessel engaged in towing exhibits two or three masthead lights (depending on the length of the tow) in a vertical line, along with sidelights and a sternlight, and a towing light (yellow sternlight substitute) above the sternlight. The illustration shows two all-round red lights, which are specifically the NUC signal, not the towing signal.