United States Coast Guard Captains License Practice Exam

A vessel engaged in trawling is required to display a green light over a white light. This specific light configuration is intended to signal its activity to other vessels, indicating that it is engaged in catching fish and may require certain navigational considerations from them. The green light is used to signify that the vessel is restricted in its ability to maneuver due to being engaged in fishing with gear that extends from the vessel, while the white light represents the vessel itself. This combination is important for safety and to ensure that other vessels are aware of the trawler's presence and operations, thereby reducing the risk of collisions.