How should a vessel navigate in fog if it hears another vessel's signal?

When navigating in fog, it is crucial for a vessel to reduce speed and maintain a proper lookout. This approach enhances safety and allows for better reaction times in the event of an unexpected encounter with another vessel. In conditions of reduced visibility, such as fog, operators are often alerted by auditory signals from other vessels. By slowing down, the vessel minimizes the risk of collision by providing more time to assess the situation and react appropriately.

Maintaining a proper lookout is vital because visibility is limited, and visual indicators of nearby vessels may not be available. Utilizing additional means to detect other vessels—such as sound signals or radar—becomes essential for safe navigation. Therefore, the combination of reducing speed and ensuring that a proper lookout is maintained is fundamental in preventing accidents in foggy conditions.