Which vessel must sound its fog signal at intervals not to exceed one minute?

A vessel that is aground must sound its fog signal at intervals not to exceed one minute to alert other vessels of its presence. This requirement is a safety measure outlined in the Navigation Rules to ensure that vessels can communicate their location, especially in low visibility conditions such as fog. The one-minute interval is essential because it allows other operators to ascertain the position of the aground vessel and take precautions to avoid collisions or other navigation hazards.

This requirement is designed to enhance safety on the water, as an aground vessel may not be able to maneuver or may pose a hazard to passing traffic. The sound signal serves as an important means of communication in situations where visual cues may be hindered. Other vessels have different requirements for sounding their fog signals based on their operational status and potential hazards they may present.