What lights must a vessel that is engaged in fishing at anchor exhibit?

A vessel engaged in fishing at anchor is required to display two all-round green lights. This configuration indicates to other vessels that it is engaged in fishing activities while at anchor. The use of these lights helps to communicate the vessel's state and activity clearly to approaching vessels, enhancing safety and navigation in coastal and open waters.

When a fishing vessel is at anchor, it is necessary to signal this status to avoid collisions, and the specific use of green lights signals that the vessel is doing fishing work, thereby alerting other vessels to proceed with caution. The distinction of using two lights rather than one is also essential as it provides a proper indication of the vessel's intentions and helps to differentiate it from vessels in other states, such as those simply at anchor or under way.

Being familiar with these requirements of the COLREGs helps ensure that mariners can navigate safely and effectively around fishing vessels, thus preventing misunderstandings or dangerous situations at sea.