Question 578 Rules of the Road

The correct answer is B) trawling. The lights shown in illustration D076RR, which are two all-round lights in a vertical line, indicate a vessel engaged in trawling operations. According to the navigation rules, vessels engaged in trawling, whether fishing with trawls or dragging for any purpose, must display two all-round lights in a vertical line where they can best be seen. This helps other vessels identify the trawling operation and navigate safely around the area. The other options are incorrect because the specified light configuration does not match the requirements for vessels engaged in laying submarine cable, towing astern, or dredging operations, which have different light requirements.