What must vessels do in a crossing situation according to the Rules?

Answer: B — Both vessels must take appropriate measures to avoid a collision

In a crossing situation, both vessels are required to take appropriate measures to avoid a collision, which aligns with the fundamental principles of safe navigation outlined in the Rules of the Road. The notion behind this requirement is to promote safety at sea by encouraging vessels to communicate their intentions and take actions that prevent accidents. This approach is rooted in the understanding that vessels may have different maneuverability, speeds, and types. Regardless of these factors, both vessels must remain vigilant and proactive in their actions. Maritime rules emphasize situation awareness, which means both parties are responsible for ensuring that a safe distance is maintained to avoid any potential collisions. While other options mention specific situations or hierarchies, they do not capture the collaborative responsibility that both vessels have in actively avoiding collisions. The principle of mutual responsibility is essential for safe navigation and is key to preventing misunderstandings that can arise in crossing scenarios.