What does a navigational buoy's color generally indicate?

A navigational buoy's color generally indicates the direction of safe passage for vessels. In maritime navigation, different colored buoys provide essential information to mariners to help them safely navigate through waters. For example, red buoys typically denote the right side of the channel when entering from open waters, while green buoys indicate the left side. This color-coded system is known as lateral marking and helps boaters understand where it is safe to travel and where they need to be cautious.

The other options do not accurately reflect the primary role of navigational buoys. Freshwater sources are not indicated by buoy colors, nor are fishing zones or restricted areas, which are usually marked by different signage or symbols. Therefore, understanding buoy colors is a crucial part of boating safety and navigation that helps prevent accidents and ensure safe passage on the water.