How should a vessel at anchor signal its presence?

A vessel at anchor is required to signal its presence to ensure that other vessels are aware of its location, particularly in conditions of reduced visibility. The correct signal for a vessel at anchor is indeed five seconds of rapid bell ringing every minute. This practice is essential for safe navigation and helps to prevent collisions, as it alerts nearby vessels of the anchored vessel's position and ensures that mariners can take appropriate actions if necessary.

The signal serves to communicate the vessel's status effectively in the marine environment, where visual signals may be hindered by fog or darkness. The specific requirement of five seconds of rapid ringing every minute is a standardized measure to ensure that the signal is noticeable without being excessive, maintaining sound discipline in navigation.