What number identifies an unlighted red buoy?

An unlighted red buoy is identified by even numbers. This numbering system is part of the U.S. Aids to Navigation System (ATON), which helps mariners easily identify navigational aids. Even-numbered buoys are typically used for marking the right side of the channel when entering from the open sea.

This system is designed to provide consistency in navigation, allowing boaters to quickly and accurately assess their position relative to navigational hazards. The use of even numbers for red buoys ensures that they are easily distinguishable from unlighted green buoys, which are assigned odd numbers and indicate the left side of the channel. This clear differentiation is crucial for safe navigation, especially in narrow or congested waterways.