Question 30 GLI07 - OUPV

The Correct Answer is C **Explanation for Option C (sailing vessel) being correct:** The illustration D080RR shows a combination of navigation lights: a red sidelight and a green sidelight visible simultaneously, along with a sternlight. * **Red Sidelight (Port)** and **Green Sidelight (Starboard)** visible together mean the vessel is heading towards you (approaching) and you are within its arc of visibility (dead ahead to slightly off the beam). * **Sternlight (White)** visible at the same time as the sidelights means the vessel is 12 meters or more in length. * The critical distinguishing feature is the *absence* of a masthead light (white forward-facing light). Vessels that are required to display a masthead light (such as power-driven vessels, vessels engaged in fishing, or vessels on pilotage duty) are displaying it when making way. Since only the sidelights and the sternlight are displayed, the vessel is required to display only these lights. According to the International and Inland Rules of the Road (Rule 25), a sailing vessel when underway shall exhibit sidelights and a sternlight. **Explanation of why other options are incorrect:** * **A) vessel on pilotage duty:** A vessel on pilotage duty (Rule 29) must display two all-around lights in a vertical line (white over red), in addition to the standard sidelights and sternlight (or masthead light if over 50m). These additional lights are missing. * **B) law enforcement vessel:** While not a specific classification for mandated lighting in the Rules (they typically follow rules for power-driven vessels or special rules for governmental vessels), if it were a typical power-driven vessel, it would display a forward masthead light, which is absent here. * **D) vessel engaged in fishing:** A vessel engaged in fishing (Rule 26) must display two all-around lights in a vertical line (red over white), in addition to sidelights and a sternlight (or a masthead light if over 50m). These fishing lights are missing.