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toward the port. Red buoys are passed on the starboard (right) side
when proceeding from open water into port, and green buoys are passed
on the port (left) side. When navigating out of port, your position to the
buoys should be reversed: red buoys to port (left) and green buoys to
starboard (right).
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 togeth-
er and you should pass to the right of the buoy as you travel upstream.
Junction Buoy (Red over Green): Means two channels are coming togeth-
er 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, an 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 flag and must operate at a
slow, no-wake speed within 200 feet.
Alpha Flag: Means a vessel is engaged in diving operations or is re-
stricted in its ability to navigate. Boaters must use extreme caution
and are advised to look for a diver’s-down flag.
NOTE: Markings may vary by geographic location. For example,
the Western Rivers System markers are slightly dierent, as well
as in dierent states or jurisdictions. Always consult appropriate
boating authorities before boating in unfamiliar waters.
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