Question 10

The Correct Answer is A **Explanation for Option A (fishing vessel):** The illustration D070RR likely depicts the lights required to be displayed by a vessel engaged in fishing, but not trawling. These lights typically include: 1. Two all-around lights in a vertical line: The upper one is green (meaning "engaged in fishing"), and the lower one is white (meaning "vessel is under command/engaged in fishing"). 2. A masthead light, aft of and higher than the all-around green light (when making way). 3. Sidelights and a sternlight (when making way). These specific vertical green-over-white all-around lights universally signify a vessel engaged in fishing (but not trawling) under both the International Regulations for Preventing Collisions at Sea (COLREGs) and Inland Rules. Therefore, a **fishing vessel** is required to display these lights. **Explanation for Incorrect Options:** * **B) motorboat:** A typical motorboat (power-driven vessel) displays a masthead light forward, sidelights, and a sternlight. It does not display the vertical green-over-white all-around lights. * **C) sailboat:** A typical sailboat (sailing vessel) displays sidelights and a sternlight (or a single tricolor light). It does not display the vertical green-over-white all-around lights or a separate masthead light. * **D) pilot boat:** A pilot boat on pilotage duty displays two all-around lights in a vertical line: the upper one white and the lower one red (White-over-Red, "Pilot Ahead"). It does not display the vertical green-over-white lights.