Which light combination indicates a vessel is fishing at night?

The correct indicator of a vessel fishing at night is the combination of green over white lights. When a fishing vessel is operating, the green light signifies that it is engaged in fishing activities, especially when it is using nets, while the white light indicates the vessel's stern. This light configuration helps other vessels in the vicinity to identify that the fishing vessel is actively fishing and thus advises them to exercise caution to avoid collisions.

Understanding the significance of other combinations is also important. For example, a red over red light typically indicates that a vessel is at anchor, while red over white denotes a vessel that is towing. White over green, on the other hand, indicates a sailing vessel under power. Each of these combinations serves a distinct purpose in maritime navigation, stressing the importance of the right light configurations for safety and compliance.