What should vessels operating in or near areas of restricted visibility do?

Vessels operating in or near areas of restricted visibility, such as fog, heavy rain, or snow, must maintain a safe speed to ensure the safety of the vessel and its crew, as well as to avoid collisions. Maintaining a safe speed allows the operator to react appropriately to any hazards that may arise, such as other vessels, navigational markers, or changes in the environment. At a safe speed, a vessel can stop, alter course, or take evasive action if necessary.

In conditions of restricted visibility, there is a higher risk of encountering other vessels or obstacles that may not be visible until they are very close. Therefore, reducing speed enhances the ability to detect potential dangers and increases the time available to respond appropriately. Safe speed considerations should also account for the vessel's maneuverability, the state of the sea, and the possible presence of other vessels.

Options that suggest proceeding at high speeds, continuing with normal operations without adjustments, or anchoring immediately do not account for the increased risks associated with low visibility. High speeds could lead to collisions, while continuing normal operations disregards the need for heightened caution. Anchoring could be appropriate in some circumstances, but it is not always the best immediate action in limited visibility, especially if it poses a