What lights indicate a vessel engaged in fishing with purse seine gear?

The correct indication of a vessel engaged in fishing with purse seine gear is represented by two yellow lights in a vertical line flashing alternately. This specific configuration is defined within the International Regulations for Preventing Collisions at Sea (COLREGS), which outlines the navigational light signals for various types of vessels and their activities.

When a fishing vessel uses purse seine gear, it is likely to have its nets deployed, and the presence of these yellow lights serves as a warning to other vessels navigating nearby. This ensures that other mariners are aware of the fishing activity taking place, promoting safety in busy waterways where multiple vessels may be operating concurrently.

The other options do not correspond to the specific signals for vessels engaged in fishing with purse seines. They represent different types of vessels or activities as per maritime regulations, which helps clarify navigation rules. Understanding these light configurations is crucial for boatswain’s mates and other mariners to ensure safe passage and to avoid collisions at sea.