What is the recommended action when approaching an unknown vessel?

Maintaining a safe distance and observing is the recommended action when approaching an unknown vessel because it prioritizes safety and allows you to assess the vessel's behavior and intentions. By observing from a distance, you can gather essential information about the unknown vessel's activities, compliance with navigation rules, and any potential hazards it may present. This approach helps to avoid misunderstandings or collisions, as it provides ample time for you to react appropriately based on the vessel's movements.

This strategy is crucial in maritime navigation, where unexpected maneuvers or lack of communication can lead to dangerous situations. Keeping a safe distance also aligns with the principles of the "Rule of Good Seamanship," which encourages mariners to exercise caution and adhere to best practices when navigating in proximity to other vessels. Such vigilance is particularly important when dealing with an unknown or unidentified vessel whose crew may not be aware of or compliant with standard navigation protocols.