255 Owner’s Manual
2-25
Responsibilities and Safety
Light Structures
Maneuvering a boat at night can be dangerous and
confusing. To aid boaters with navigation and warn
of hazards, the USCG and the state and local
authorities maintain a variety of light structures.
Some light structures may be equipped with radio
beacons, radar reflectors and/or signals.
Minor Lights
Minor lights are colored according to the buoyage
marking system in use. They are similar to lighted
buoys, except they are usually higher and on more
stable platforms to increase visibility. Most minor
lights are part of a series to mark a channel, river or
harbor.
Federal Waterways Marking System (FWMS)
Lateral Aids Marking
the Sides of Channels
as seen When Entering
From Seaward
Safe Water Aids
Marking MId-Channels
and Fairways
(No Numbers–May be
Lettered)
Port Side
Odd Numbers
Starboard Side
Even Numbers
Lighted Buoy
Lighted Buoy
Can Buoy
Nun Buoy
Daymark
Daymark
Lighted
Spherical Buoy
Daymark
Preferred Channel Aids
(No Numbers–May be
Lettered)
Preferred
Channel
to Starboard
Lighted Buoy
Preferred
Channel
to Port
Lighted Buoy
Nun Buoy
Daymark
Daymark
COB_0037_A
Can Buoy
3
5
2
4
E
C
B
D
G
H
L
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