Which buoys indicate the preferred channel to the left?

Nun buoys are specifically designed to indicate the preferred channel to the left when approaching from the open sea or upstream. These buoys are typically shaped like pyramids and are painted red, following the IALA (International Association of Lighthouse Authorities) buoyage system.

When navigating, a mariner will see nun buoys on their starboard side (right side) when entering a channel from the sea and will also recognize that they should steer to the left to stay within the safe passage marked by these buoys. This is crucial for ensuring safe navigation and avoiding hazards. The distinct color and shape of nun buoys provide clear signals to boaters about the navigational routes to follow.

Other buoy types, such as can buoys or lighted buoys, serve different navigational purposes. Can buoys, for example, indicate the right side of the channel and are typically green. Lighted buoys have the added feature of lights for visibility but do not specify the side of the channel. Rough buoys serve as warning markers for underwater obstacles but do not indicate navigable channels directly.