What is a buoy used for in nautical navigation?

A buoy serves as a floating device that provides important information in nautical navigation by marking specific areas such as channels, hazards, or swimming zones. This helps sailors and boaters navigate safely by identifying the boundaries of navigable waters, guiding them through channels, and warning them of obstructions or shallow areas.

In maritime contexts, buoys can come in various colors and shapes, conveying different meanings based on international navigation rules. For example, a green buoy typically marks the starboard side of a channel when entering from open water, whereas red buoys generally denote the port side. This marking system is crucial for safe navigation and helps to prevent collisions and grounding.

While safety equipment is essential on board, a buoy specifically functions primarily as a navigational aid rather than a means of safety equipment like life vests or firefighting gear. Additionally, buoys are not vessels used for fishing or methods of measuring water depth, although some specialized buoys may incorporate depth-measuring devices. The primary role of a buoy, however, remains indicating navigational pathways and ensuring safe water travel.