When navigating in low visibility, what action should the OOD prioritize?

When navigating in low visibility, the primary concern for the Officer of the Deck (OOD) is to ensure the safety of the vessel and its crew. Evaluating and adjusting safe speed is crucial in reducing the risk of collisions and grounding, which are heightened in conditions of limited visibility. By assessing safe speed, the OOD can make informed decisions on how fast the vessel should travel, taking into account factors such as visibility distance, traffic density, and the maneuverability of the vessel.

In low visibility, it may be necessary to slow down or even stop the vessel to allow for better decision-making and increased reaction time to unexpected situations. This approach aligns with the principles set out in the Navigation Rules, which emphasize operating at a safe speed as a fundamental requirement. Therefore, prioritizing the evaluation and adjustment of safe speed is both a responsible and industry-recognized practice in ensuring navigational safety under such conditions.