What type of buoys are equipped with a white light that displays a slow flash?

The correct classification for buoys equipped with a white light that displays a slow flash is best described as Safe Water Buoys. These buoys are specifically designed to indicate that there is safe water all around the buoy, and the flashing white light helps to enhance visibility for mariners, especially at night or in poor weather conditions. Safe Water Buoys are often used to mark fairways and can also indicate the center of a channel.

Mooring buoys, on the other hand, serve a different purpose; they are typically used for boaters to tie up their vessels and usually do not have flashing lights. Red buoys often mark the starboard side of a channel when coming from sea and can exhibit different types of lights, but not usually a slow flashing white light. Channel markers indicate the edges of navigable channels and may also feature lights, but they do not specifically denote safe water like Safe Water Buoys do. Thus, the distinguishing factor of the white light with a slow flash aligns with the function and purpose of Safe Water Buoys.