Question 30 UFV01 - Master - Uninspected Fishing Vessels

The Correct Answer is C **Explanation for Option C (sailing vessel) being correct:** The illustration D080RR shows a single white light visible, positioned high above the water (implying a masthead or all-round light used for identification, but in this specific context, the configuration must be matched to the Rules). According to the US Inland and International Rules of the Road (COLREGs), a **sailing vessel** of less than 20 meters in length may combine its mandated sidelights and sternlight into a single lantern carried at or near the top of the mast where it is most effectively seen. This combined lantern displays red to port, green to starboard, and white astern. However, if you are observing a sailing vessel from a specific angle (e.g., directly ahead, slightly off to the side, or directly astern), you would only see the relevant sector of light being displayed. If the observer sees **ONLY** a single white light, it indicates that the vessel is being viewed directly from the **stern**. The white light visible is the sternlight portion of the combined lantern (or the separate sternlight if the vessel is over 20m, but the *simplest* explanation matching a single white light often refers to the stern view of any vessel). Therefore, seeing a single white light means the vessel is moving away from the observer, and in the context of typical recognition rules, this strongly identifies the stern view of a vessel that is not engaged in towing, pushing, or anchoring, fitting the profile of a vessel underway, such as a sailing vessel viewed from astern. **Explanation of why other options are incorrect:** * **A) vessel on pilotage duty:** A vessel engaged in pilotage duty displays two all-round lights: a white light over a red light. This is a very distinct two-light signal, not a single white light. * **B) law enforcement vessel:** A law enforcement vessel (when engaged in enforcement activities) must display an identification signal specified by local authorities, which typically involves a flashing blue light, often in conjunction with its standard running lights. It does not display a single, steady white light as its primary identifying signal. * **D) vessel engaged in fishing:** A vessel engaged in fishing (other than trawling) displays two all-round lights: a red light over a white light. Trawlers display a green light over a white light. Neither configuration matches the single white light shown.