Question 10 RVR05 - Master of LT 100 GRT

The Correct Answer is A **Why Option A ("fishing vessel") is correct:** The illustration D070RR (which is not physically present but is referenced as showing specific lights) depicts the combination of lights mandated for a vessel engaged in fishing. This typically includes: 1. Two all-round lights arranged vertically: a green light above a white light (signifying a vessel engaged in fishing, but not trolling). 2. Sidelights (red on port, green on starboard). 3. A sternlight. This specific configuration (green over white all-round lights plus running lights) uniquely identifies a vessel engaged in fishing under the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 26. These rules apply to both international and inland waters (though inland rules may have slight variations, the green-over-white concept for fishing is standard). **Why Option B ("motorboat") is incorrect:** A motorboat (power-driven vessel underway) displays a white masthead light (or two, depending on length), sidelights, and a sternlight. It does not display the vertically arranged green over white all-round lights, as those indicate restricted maneuverability due to fishing activity. **Why Option C ("sailboat") is incorrect:** A sailboat (sailing vessel underway) displays only sidelights and a sternlight. If less than 20 meters in length, it may combine these into one lantern, or it may use a tricolor light at the masthead. It never displays the vertical green over white all-round lights. **Why Option D ("pilot boat") is incorrect:** A pilot boat (when engaged on pilotage duty) displays two all-round lights arranged vertically: a white light above a red light ("white over red, pilot ahead"). It does not display the green over white lights, which are reserved for fishing vessels.