United States Coast Guard Captains License Practice Exam

A vessel engaged in trawling is required to display which light configuration?

1. Red light over a white light

2. Green light over a white light

3. White light over a red light

4. White light over a green light

The correct answer is: Green light over a white light

A vessel engaged in trawling is required to display a green light over a white light. This specific light configuration is mandated by the International Regulations for Preventing Collisions at Sea (COLREGS) to indicate the nature of the vessel's operations. The green light signifies that the vessel is engaged in fishing, specifically while using nets, lines, or trawls, which can impede the movement of other vessels in the area. The white light component signifies that the vessel is on a task that requires nighttime visibility. By using this configuration, the trawler is signaling to other vessels its activity and position, allowing for safer navigation and reduced risk of collision. The other light combinations do not pertain to trawling operations. The red and white lights, or combinations thereof, are associated with other types of navigation and activities, and would not correctly indicate the presence and activity of a trawling vessel. Knowing the correct light configuration is essential for both compliance with navigation rules and ensuring safety on the water.