What aspect should always be reviewed before moving into restricted waters?

Before moving into restricted waters, the navigation checklist is vital to ensure safe passage. The navigation checklist typically includes essential factors such as verifying charts, confirming the vessel's position, checking for any navigational hazards, and ensuring that all relevant equipment—like radios and GPS—are functioning correctly. This checklist helps to mitigate risks associated with navigation in confined areas, where the margin for error is significantly reduced.

While aspects like fuel levels, weather patterns, and previous voyages are certainly important for overall vessel operation and safety, they do not specifically address the immediate needs and potential hazards of navigating restricted waters. A comprehensive navigation checklist directly focuses on the navigational safety elements crucial for safe maneuvering in these challenging areas.