What shape are nun markers, and where should they be kept when proceeding upstream?

Nun markers are cone-shaped navigational aids used in inland and coastal waters to indicate safe passage for vessels. When navigating upstream, these markers should be kept on the right (or starboard) side of the vessel. This is a key part of the buoyage system; the shape and positioning help boaters understand their course, ensuring they steer clear of hazards and maintain safe navigation.

The cone shape of the nun marker makes it easily identifiable and distinguishes it from other types of markers. This visual cue is essential for mariners as they navigate the waterways. By adhering to the regulation that requires these markers to be kept on the starboard side when proceeding upstream, boaters can ensure they follow safe navigation practices.