What is the appropriate fog signal for a vessel at anchor?

The appropriate fog signal for a vessel at anchor is one ring every minute. This signal is important for safety, as it helps other vessels in the area to be aware of the anchored vessel's presence in low visibility conditions such as fog.

In the context of maritime regulations, a single ring indicates to navigators that there is a vessel at anchor, which can aid in preventing collisions. The timing of one ring every minute is specified in international rules to ensure that the signal is consistent and can be easily recognized by other mariners.

Other signals, such as two rings or different combinations of blasts, indicate other conditions or types of vessels. For example, two rings might suggest a different status than being anchored, while three short blasts is typically used to communicate a maneuvering intention. A long and short blast signal serves a different purpose as well, usually indicating that the vessel is restricted in its ability to maneuver. Knowing the correct signal to use helps maintain safety and communication on the water.