What must a vessel do if it cannot maintain its speed due to fog?

In conditions of reduced visibility such as fog, vessels face significant challenges in navigation. The requirement to take all way off means that the vessel should stop or slow down sufficiently to minimize the risk of collision and to navigate safely. This approach emphasizes the importance of exercising caution in difficult visibility conditions, as it allows the crew to assess their surroundings more effectively and respond appropriately to any potential hazards.

By navigating cautiously after reducing speed, the vessel enhances its ability to avoid collisions with other vessels that may not be seen in time. The need for careful navigation also highlights the importance of being vigilant, listening for other vessels' signals, and using radar if available. Dropping anchor or notifying other vessels may be relevant in certain situations, but the immediate priority must be to adjust speed and navigate safely in the uncertain visibility of fog.