The following are the markings under the Uniform State Waterway Marker System:
Green or Black Channel Marker Buoy: Traveling upstream, you should pass to
the right of the buoy as it marks the left side of the channel.
Red Channel Marker Buoy: Traveling upstream, you should pass to the left of this
buoy as it marks the right side of the channel.
Junction Buoy (Green over red): Means two channels are coming together and
you should pass to the right of the buoy as you travel upstream.
Junction Buoy (Red over green): Means two channels are coming together and
you should pass to the left of the buoy as you travel upstream.
Passing Daymark (green): A sign mounted on poles in the water or on the bank
which is used in the same manner as a channel marker buoy. In this case it marks the left
side of the channel as you travel upstream.
Passing Daymark (red): A sign mounted on poles in the water or on the bank
which is used in the same manner as a channel marker buoy. In this case it marks the
right side of the channel as you travel upstream.
Channel Crossing Daymark (green): A sign mounted on poles in the water or on
the bank which means the channel is crossing from the left bank to the right bank as you
travel upstream.
Channel Crossing Daymark (red): A sign mounted on poles in the water or on the
bank which means the channel is crossing from the right bank to the left bank as you
travel upstream.
Boats Keep Out Buoy: Marks a swimming area, area near a dam or any area where
boats are not allowed.
Danger Buoy: Marks an obstruction, ferry cable, or any area where boats should
not navigate or should use extreme caution.
Information Buoy: Used to relay information. Words printed in black (usually
inside the border) tell place names, distances, directional arrows, availability of supplies,
gasoline, etc.
Control Buoy: Marks a restricted area such as “slow no-wake,” “5 MPH, no skiing
or no fishing.”
Mooring Buoy: Means an anchor buoy. This is the only buoy to which a boat may
tie or secure to.
Diver’s Flag: Must be used any time a diver is in the water. Boats must not come
closer than 50 feet of the ag and must operate at a slow, no-wake speed within 200 feet.
Alpha Flag: Means a vessel is engaged in diving operations or is restricted in
its ability to navigate. Boaters must use extreme caution and are advised to look for a
diver’s-down ag.
Remember: Markings may vary by geographic location. For example, the West-
ern Rivers System markers are slightly dierent, as well as in dierent states or
jurisdictions. Always consult appropriate boating authorities before boating in
unfamiliar waters.
2013 MasterCraft Owners Manual • Safety Knowledge • Page 1-30
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