GREEN LATERAL MARKER
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-A.gif)
Keep this marker on your left (port) side when proceeding in the upstream (returning from sea) direction. Odd numbers will be displayed and will increase as you head upstream.
RED LATERAL MARKER
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-B.gif)
Keep this marker on your right (starboard) side when proceeding in the upstream (returning from sea) direction. Even numbers will be displayed and will increase as you head upstream.
RED AND GREEN LATERAL MARKER
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-C.gif)
You may pass this marker on either side when proceeding in the upstream direction, but the main or preferred channel is indicated by the color of the topmost band. For example: the marker in this illustration indicates the preferred channel is to the right.
NUN BUOYS
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-D.gif)
Cone-shaped markers that are always red in color, with even numbers. Keep this marker on your right (starboard) side when proceeding in the upstream returning from sea) direction.
CAN BUOYS
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-E.gif)
Cylindrical-shaped markers that are always green in color, with odd numbers. Keep this marker on your left (port) side when proceeding in the upstream (returning from sea) direction.
DAY-MARKS
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-F.gif)
Red triangles with even numbers are the equivalent of nun buoys: keep this marker on your right side. Green squares with odd numbers are the equivalent of can buoys: keep this marker on your left side. Both red triangles and green squares can be lighted as well.
GENERAL RULE OF THUMB
(http://www.boaterexam.com/usa/images/courseManual/6_6_1-G.gif)
Red-Right-Returning — keep the red markers on your right side when returning upstream from sea.
INTERCOASTAL WATERWAY
The Intercoastal Waterway (ICW) is a series of tributaries generally running parallel along the Atlantic and Gulf of Mexico coasts. The ICW runs from New Jersey to Texas. Navigation aids along the ICW are the same as any other U.S. waterway, with the exception of yellow markings. The yellow markings override the shape or color of the lateral markers they are affixed on, and indicate the route of the ICW.
YELLOW SQUARE
(http://www.boaterexam.com/usa/images/courseManual/6_6_3-A.gif)
indicates you should keep this marker on your left (port) side.
YELLOW TRIANGLES
(http://www.boaterexam.com/usa/images/courseManual/6_6_3-B.gif)
Indicate you should keep this marker on your right (starboard) side.