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Appendices | RS90 Operating Manual
CH TX (MHz) RX (MHz) Mode Trac Type Ship to
Ship
Ship to
Shore
Name Tag Remark
77 156.875 156.875 S Port Operations Yes Yes PORT OPS
1
1W only
78A 156.925 156.925 S Boat Operations, Recreational Yes No SHIP - SHIP
79A 156.975 156.975 S Commercial Yes Yes COMMERCIAL
80A 157.025 157.025 S Commercial Yes Yes COMMERCIAL
81A 157.075 157.075 S
U.S. Government, Environmental Protec-
tion Agency Operations
Yes Yes RESTRICTED
4
82A 157.125 157.125 S U.S. Government, Canadian Coast Guard Yes Yes RESTRICTED
4
83A 157.175 157.175 S U.S. Government, Canadian Coast Guard Yes Yes RESTRICTED
4
84 157.225 161.825 D Public Correspondence, Marine Operator No Yes TELEPHONE
84A 157.225 157.225 S Public Correspondence, Marine Operator TELEPHONE
85 157.275 161.875 D Public Correspondence, Marine Operator No Yes TELEPHONE
85A 157.275 157.275 S Public Correspondence, Marine Operator TELEPHONE
86 157.325 161.925 D Public Correspondence, Marine Operator No Yes TELEPHONE
86A 157.325 157.325 S Public Correspondence, Marine Operator TELEPHONE
87 157.375 161.975 D Public Correspondence, Marine Operator No Yes TELEPHONE
87A 157.375 157.375 S Public Correspondence, Marine Operator COMMERCIAL
88 157.425 162.025 D Public Correspondence, Marine Operator No Yes TELEPHONE
88A 157.425 157.425 S Commercial, Inter-ship Only Yes No COMMERCIAL
Special notes on USA channel usage
1. Low power (1 W) only.
2. Receive only.
3. Low power (1 W) initially. Override to high power by holding down
H/L key before transmitting. Used normally in bridge-to-bridge
communications.
4. Lightly shaded simplex channels 03A, 21A, 23A, 61A, 64A, 81A,
82A, and 83A cannot be lawfully used in U.S. waters unless special
authorization is obtained from the U.S. Coast Guard. Not for use by
the general public.
5. The letter “A” illuminated by the channel number indicates the USA
channel is simplex.
This same channel is always duplex when selecting International.
There is no “A” reference for Interna tional channels. The letter “B” is
only used for some Canadian “Receive only” channels.
6. Channel 70 is designated for use exclusively for Digital Selective
Calling (DSC), such as Distress, Safety, and Ship Calls. No voice
communication is allowed on CH70. This channel is only available
on DSC enabled radios.
KEY: S = Simplex operating channel; D = Duplex operating channel