How are the numbers on buoys typically arranged when heading upstream?

When navigating waterways, buoys are arranged in a specific numbering system to help boaters identify their direction of travel. When heading upstream, the buoy numbers increase consecutively. This system of numbering is part of the U.S. Aids to Navigation System, where, generally, odd numbers are found on the left side of the channel and even numbers on the right side when traveling upstream. This consistent manner of arrangement aids in navigation, allowing boaters to easily gauge their position on the waterway and ensure they are following the correct path.

The arrangement can be seen in many navigable rivers and channels, adhering to this convention to promote safety and clarity for all vessels on the water. The other choices do not accurately depict how numbering works. For instance, stagnant numbers would not provide any navigational information and alternating odd and even numbers might confuse rather than aid boaters. Hence, the correct response reflects the established navigation guidelines that are crucial for safe boating practices.