What should a vessel do upon hearing a fog signal?

Upon hearing a fog signal, a vessel should slow down and proceed with extreme caution. This protocol is essential for ensuring the safety of both the vessel and others in the vicinity, as fog signals are specifically designed to alert mariners to potential obstructions or hazards in low visibility conditions.

By slowing down, the captain allows for better reaction times should an unforeseen obstacle arise, thus reducing the risk of collision. Navigating at a reduced speed also enables the crew to utilize sound signals more effectively and makes it easier to recognize other vessels in the area, as sightlines may be significantly obscured by fog.

Furthermore, maintaining caution while proceeding helps ensure that the vessel can be maneuvered safely through potentially crowded or hazardous waters. In contrast, speeding up could lead to loss of control or insufficient time to respond to other vessels, while changing course abruptly may cause confusion among other mariners. Ignoring the signal could result in serious incidents, especially if others are following the maritime rules designed to aid navigation in fog.