Yamaha WaveRunner V1 2016 Owner's/Operator's Manual page 27

Many bodies of water used by boaters are
entirely within the boundaries of a particular
state. The Uniform State Waterway Marking
System has been devised for these waters.
This system uses buoys and signs with dis-
tinctive shapes and colors to show regulatory
Safety information
or advisory information. These markers are
white with black letters and orange borders.
They signify speed zones, restricted areas,
danger areas, and general information.
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