Under the Navigation Rules, what are the lights displayed by a fishing vessel trawling?

A fishing vessel engaged in trawling is required to display specific lights as outlined in the Navigation Rules to indicate its activity to other vessels. The correct display for a trawling vessel includes two green lights, which are shown in a vertical line. This lighting configuration serves to alert other vessels that the fishing vessel is actively fishing and provides an understanding of the direction the vessel is facing.

This configuration is essential for ensuring safe navigation by making the trawling activity visible during nighttime or in low visibility conditions. Other light configurations such as two red lights or a white and green light would not communicate the trawling status effectively. A flashing white light, while it might indicate something else under specific circumstances, does not apply to vessels that are trawling. Thus, proper adherence to the lighting requirements plays a crucial role in maritime safety and navigation compliance.