A buoy that indicates that it is safe to navigate may have which color combination?

A buoy that indicates it is safe to navigate typically uses a combination of colors that provides clear guidance to mariners. The red and green color combination is significant as it represents lateral marks in navigation. Specifically, the combination of red and green is often used in daymarks to indicate safe waters.

The color red generally denotes the port (left) side when entering a harbor, while green indicates the starboard (right) side. In many navigational systems, the appearance of both colors implies that the route between the buoys is safe for vessels to traverse. This understanding is essential for mariners to interpret the symbols correctly and make appropriate navigation decisions.

Other combinations present in the choices do not correlate with the indication of safe navigation. For instance, red and yellow often correspond to caution or a special mark, and green and red typically denote the sides of a channel rather than a safe passage between them. Green and white are not recognized as standard in the context of safe navigation indicators either. Thus, the red and green buoy effectively communicates the message of safety in navigation contexts.