Question 10 TV03 - Towing Vessels - Western Rivers

The Correct Answer is A. **Explanation for A (fishing vessel):** The lights shown in the illustration D070RR typically depict a vessel engaged in fishing (trawling or non-trawling) that is underway. According to the International Regulations for Preventing Collisions at Sea (COLREGs) Rule 26 (Fishing Vessels), a vessel engaged in fishing shall exhibit: * Two all-round lights in a vertical line, the upper being green and the lower white (or red-over-white, depending on the type of fishing, but green-over-white is specifically used for vessels trawling). * A masthead light abaft of and higher than the all-round green light (when making way through the water). * Sidelights and a sternlight (when making way through the water). A vessel displaying the specific combination of lights representing a vessel constrained by its gear (such as the two all-round lights) is definitively required when engaged in fishing, making the **fishing vessel** the correct answer. **Explanation for Incorrect Options:** * **B) motorboat:** A typical motorboat (power-driven vessel less than 50 meters) only displays a masthead light forward, sidelights, and a sternlight. It does not display the characteristic two all-round lights (e.g., green over white or red over white) specific to fishing or other restricted vessels. * **C) sailboat:** A sailing vessel typically displays only sidelights and a sternlight, or optionally, two all-round lights in a vertical line (red over green) but only if they are less than 20 meters in length. It does not display the specific combination of masthead light and characteristic fishing lights shown in the illustration. * **D) pilot boat:** A pilot vessel, when engaged on pilotage duty, displays two all-round lights in a vertical line (white over red). This differs from the characteristic lights shown for a vessel engaged in fishing (e.g., green over white, or red over white).