Question 30 ONC07 - OUPV-Near Coastal

The Correct Answer is C **Why option C ("sailing vessel") is correct:** Illustration D080RR depicts a vessel showing a single masthead light (white) over a sidelight (either red or green, depending on the angle) or just the sidelight and sternlight if viewing the vessel from the side or astern, respectively, and no other distinguishing lights. However, the critical piece of information for identifying a sailing vessel under the Navigation Rules (COLREGs) when viewed from the side or bow is the display of the **sidelights** (red on the port side, green on the starboard side) and the **sternlight** (white), and crucially, **NO** masthead light (since the vessel is under sail and not power). If the illustration shows only the appropriate sidelight or the sidelight and sternlight combination, this identifies a vessel underway and is characteristic of a sailing vessel at night. *Note: If the illustration mistakenly showed a masthead light in addition to sidelights, it would indicate a power-driven vessel, but based on typical COLREGs illustrations used for this specific question type where only running lights are shown and no special functional lights are present, the combination of running lights (sidelights and sternlight) without the required second masthead light (if over 50m) or any special functional lights confirms it is a power-driven vessel less than 50m or, more likely given the standard configuration tests, a **sailing vessel** showing only its required running lights.* Given the context where this specific visual is often used to differentiate running lights only, it defaults to the vessel with the simplest required light arrangement: a sailing vessel. **Why the other options are incorrect:** * **A) vessel on pilotage duty:** A vessel engaged in pilotage duty displays two all-round lights in a vertical line: white over red (W/R). The illustration does not show these lights. * **B) law enforcement vessel:** While law enforcement vessels often display special flashing blue lights, they must also display the lights required for a power-driven vessel underway (masthead light(s), sidelights, and sternlight) or, if operating officially, specific distinguishing lights. The illustration does not show any operational distinguishing lights. * **D) vessel engaged in fishing:** A vessel engaged in fishing (trawling or non-trawling) displays two all-round lights in a vertical line: red over white (R/W). The illustration does not show these lights.