Define "buoyage system" in maritime navigation.

The term "buoyage system" refers specifically to a collection of navigational aids, such as buoys and beacons, that are utilized to denote safe channels, hazards, and other important navigational information in maritime navigation. These aids are critical for guiding vessels safely through waters, helping to prevent accidents by marking shoals, rocks, and other dangers, as well as indicating the safest routes for navigation.

The system is designed to provide uniformity and clarity so that mariners can easily understand the signals and markings, which may vary by region but generally follow established international standards. This ensures that vessels have reliable guidance regardless of where they are navigating, enhancing maritime safety.

The other options do not accurately define the buoyage system. Communication protocols, docking procedures, and vessel ranking systems are separate aspects of maritime operations and do not relate directly to the purpose or function of a buoyage system.