What is required of a vessel navigating in restricted visibility?

Answer: B — Have engines ready for immediate maneuver

When a vessel is navigating in restricted visibility, it is essential to have engines ready for immediate maneuvering. This requirement is crucial because visibility limitations can arise suddenly due to fog, rain, snow, or other environmental factors. Having engines ready allows the vessel to respond promptly to changing situations or unforeseen obstacles, enhancing safety. In restricted visibility, vessels must be particularly cautious. This involves being able to decrease speed or stop, change course, or take other evasive actions quickly. The ability to maneuver readily is paramount when encountering other vessels or hazards in such conditions. While keeping a lookout and operating at safe speeds are necessary practices, the emphasis on engine readiness ensures that immediate and decisive actions can be taken to avoid collisions or navigate through challenging areas safely. This proactive approach is a fundamental principle of the Rules of the Road, prioritizing safety in navigation under less-than-ideal conditions.