Pro-Line Boats 33 Express Owner's Manual page 62

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Uniform States Waterway Marking System
There are three kinds of markers in this system; Regulatory, Informational and Lateral.
Regulatory Markers
Regulatory markers in this system are either signs or buoys. Signs are square with orange borders. Regulatory
buoys are white and shaped like cylinders. They have horizontal orange bands near their tops and just above the
water's surface. An orange circle on a marker means a controlled area. A message such as "No Wake, Idle
Speed, No Skiing, or 5 MPH" may appear on the marker. An orange diamond means danger. If the diamond has
an orange cross inside it, don't enter the area. The reason you should stay out, such as "Swim Area", may be
printed in black on the marker.
Informational Markers
Informational markers are white signs with orange borders. They give information such as direction, distance and
location.
Lateral Markers
Lateral markers in the Uniform State Waterway Marking System (USWNS) are either numbered red or black
buoys. Black buoys may have green reflectors or lights. They are the equivalent of green buoys in the IALA-B
system. Red buoys may have red reflectors or lights. They are the same as red buoys in the IALA-B system. Red
and black buoys are usually found in pairs and you should always pass between them.
A Special Sign
In Florida you may see a special sign: "Caution, Manatee Area". When you see this sign, slow down to idle
speed. Manatees are an endangered species and are large, passive, and slow moving mammals. Many manatees
are seriously injured or killed each year by boat propellers.
Navigational Aids
The following two pages contain information concerning whistle signals, storms
warnings, bridge signals and buoy descriptions.