Red triangles with even numbers on day marks should be kept on which side when proceeding upstream?

When navigating upstream, red triangles with even numbers on day marks indicate that you should keep these markers on your right side, or starboard. This system is based on the "Uniform State Waterway Marking System," which is used in many states, including Nebraska. The purpose of these markings is to help boaters identify navigable channels and ensure safe passage through waterways.

By keeping the red triangles on your right side when traveling upstream, you are following the convention established for marking waterways, which aids in preventing collisions and ensures that all boaters are aware of where they should be on the water. This rule helps maintain consistency and safety in navigation, as all boaters will understand the proper orientation for passing these markers.

In contrast, keeping these markers on the left side (port side) or both sides equally would contradict the established rules and could lead to confusion and unsafe conditions on the waterway. Directly in front would also go against navigation best practices since it does not address sidekeeping as required by the marking system.