Red lights may appear on which type of buoy?

Red lights are typically associated with horizontally-banded buoys, which are often used to mark navigational channels, hazards, or specific areas in water bodies. The red color indicates a certain condition or warning to boat operators, aligning with standard nautical practices where red denotes caution or a critical point of interest.

This design is part of a consistent color-coding system in buoy navigation, where colored bands signal different navigational information, and the presence of a red light reinforces its significance as a navigational aid during low visibility conditions. In contrast, the other types of buoys listed—vertically-striped, yellow, and spherical—do not typically feature red lights as part of their designation or function, adhering to different signaling systems or colors in maritime navigation. Understanding this system is vital for safe navigation and compliance with maritime regulations.