What does the term "navigational watch" refer to?

The term "navigational watch" specifically refers to the period when the vessel is being actively observed and navigated. During this time, qualified personnel are responsible for monitoring the ship's position, course, speed, and surrounding environment to ensure safe navigation. This includes keeping an eye on navigation instruments, radar systems, and other aids to navigation, as well as being alert to other vessels and potential hazards.

This crucial function helps prevent accidents and ensures that the vessel meets its navigational goals effectively. The watch team must remain vigilant and proactive to respond to changing conditions and circumstances that may affect the safety of the vessel and its crew.

In contrast, the other options do not capture the essence of what a navigational watch entails. Ship maintenance, crew rotation schedules, and periods at anchor do not specifically pertain to the active navigation of a vessel and the responsibilities associated with ensuring safety and proper navigational practices during that time.