GME GX850W - Manual (Page 27)

G X 8 5 0 I N S T R U C T I O N M A N UA L 2 7
U.S. MARINE VHF CHANNELS AND FREQUENCIES cont.
CH TX Freq RX Freq Simplex Use
63A 156.175 156.175 X Port Operations and Commercial, VTS. Available only in New
Orleans / Lower Mississippi area.
65A 156.275 156.275 X Port Operations
66A 156.325 156.325 X Port Operations
67 156.375 156.375 X Commercial. Used for Bridge-to-bridge communications in Lower
Mississippi River. Intership only.
68 156.425 156.425 X Non-Commercial
69 156.475 156.475 X Non-Commercial
70 156.525 156.525 X Digital Selective Calling (voice communications not allowed)
71 156.575 156.575 X Non-Commercial
72 156.625 156.625 X Non-Commercial (Intership only)
73 156.675 156.675 X Port Operations
74 156.725 156.725 X Port Operations
77 156.875 156.875 X Port Operations (Intership only)
78A 156.925 156.925 X Non-Commercial
79A 156.975 156.975 X Commercial. Non-Commercial in Great Lakes only
80A 157.025 157.025 X Commercial. Non-Commercial in Great Lakes only
81A 157.075 157.075 X U.S. Government only - Environmental protection operations.
82A 157.125 157.125 X U.S. Government only
83A 157.175 157.175 X U.S. Coast Guard only
84 157.225 161.825 Public Correspondence (Marine Operator)
85 157.275 161.875 Public Correspondence (Marine Operator)
86 157.325 161.925 Public Correspondence (Marine Operator)
87 157.375 157.375 X Public Correspondence (Marine Operator)
88A 157.425 157.425 X Commercial, Intership only
NOAA Weather Channels
WX1 162.550
WX2 162.400
WX3 162.475
WX4 162.425
WX5 162.450
WX6 162.500
WX7 162.525
Channel numbers, e.g. (WX1, WX2) etc. have no special
significance but are often designated this way in consumer
equipment. Other channel numbering schemes are also
prevalent.
The order of channels shown is the order they were established
and is slowly becoming less popular over time than a numerical
ordering of channels.
See NATIONAL WEATHER SERVICE MARINE PRODUCTS
VIA NOAA WEATHER RADIO and the NOAA Weather Radio
Homepage for more information.
Additional Information, Frequencies, and Charts.
Frequencies are in MHz. Modulation is 16KF3E or 16KG3E.
Recreational boaters normally use channels listed as Non-
Commercial: 68, 69, 71, 72, 78A.
Channel 70 is used exclusively for Digital Selective Calling
(DSC) and is not available for regular voice communications.
Channels 75 and 76 are reserved as guard bands for Channel
16 and are not available for regular voice communications.
Note that the letter A indicates simplex use of the ship station
transmit side of an international duplex channel, and that
operations are different than international operations on
that channel.
Some VHF transceivers are equipped with an International
– U.S. switch for that purpose. A channels are generally only
used in the United States, and use is normally not recognized
or allowed outside the U.S. The letter B indicates simplex
use of the coast station transmit side of an international
duplex channel. The U.S. does not currently use B channels for
simplex communications in this band.
Boaters should normally use channels listed as Non-
Commercial. Channel 16 is used for calling other stations or
for distress alerting. Channel 13 should be used to contact a
ship when there is danger of collision. All ships of length 20m
or greater are required to guard VHF channel 13, in addition
to VHF channel 16, when operating within U.S. territorial
waters. Users may be fined by the FCC for improper use of
these channels.