What is required of a vessel to indicate a fishing operation?

When a vessel is indicating that it is engaged in fishing operations, it is required to exhibit specific shapes and lights as prescribed by the maritime regulations. These signals are important for ensuring that other vessels recognize the fishing status of the vessel, promoting safe navigation in shared waters.

For a vessel actively fishing, it typically must display two conical shapes in a vertical arrangement when at anchor. If the vessel is engaged in trawling, it may also exhibit appropriate lights at night. This visibility aids in alerting other vessels to the fishing activity, which can prevent accidents, collisions, or disruptions to the fishing process.

The other options do not align with the established requirements. Simply displaying a fishing net would not provide an adequate warning or signal to other vessels regarding the fishing operation. Sound signals, while important in some contexts for communication, are not specifically required solely for indicating a fishing operation. Maintaining a vessel at half mast does not pertain to fishing activities at all and relates instead to displaying mourning. Hence, showing specific shapes and lights is the correct and required method for a fishing vessel to indicate its operation.