The red nun or spar should be on which side when going upstream?

When navigating upstream, the red nun buoy should be on the starboard (right) side of the vessel. This convention is based on the "meeting the markers" rule in the IALA (International Association of Lighthouse Authorities) system, which governs buoyage. The purpose of this system is to provide a reliable framework for safe navigation in channels and waterways.

The right side being marked with a red buoy indicates the proper side to keep your vessel clear of hazards and to ensure safe passage. These vertical red buoys often have a conical shape, resembling a nun's hat, which helps mariners easily identify them, especially in areas with multiple markers. By following this rule, boaters can navigate safely and avoid accidents near navigation hazards.