Raymarine RAY 210VHF Operation Manual page 70

U.S. Coast Guard
Channel: 22
Vessels: Any
Use: Working channel for exchange of
communications communications with
stations of the U.S.. Coast Guard
Between: Ship to U.S. Coast Guard ship,
coast to aircraft stations
Comments: U S. Coast Guard does not
regularly monitor this channel Establish
contact on channel 16 and shift to
channel 22 as directed.
Navigation
Channel: 13
Vessels: Any
Use: Safety communications pertaining
to the manoeuvring of vessels or the
directing of vessel movements
Primarily ship-to-ship and secondarily
ship-to coast
This is commonly called the Bridge-to-
Bridge channel.
towboats depend on this channel for their
safe navigation. Railway or highway
bridges which open for ship navigation
often operate on this channel
Bridge-to-Bridge stations must reduce
power to one watt for routine operations.
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Large vessels and