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Naut Air Sec 2_2008.qxd:Naut Air Sec 2.qxd
Section 2
USWMS System
In the USWMS Lateral System, well-defined channels are marked
with red and black buoys. Lateral means the sides of the channel
are marked and the boat should pass between them.
The USWMS Cardinal System is used when there is no well-defined
channel or where an obstruction may be approached from more
than one direction. With the cardinal system:
• Pass north or east of BLACK-TOPPED WHITE buoy.
• Pass south or west of RED-TOPPED WHITE buoy.
• RED and WHITE VERTICALLY STRIPED buoy indicates
boat should pass outside of the buoy (away from shore).
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KC-0412C
Mooring Buoy – White with Blue Band
May Show White Reflector or Light
6/24/08
3:08 PM
Page 2-2
BLUE
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