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Channel name/description Used for:
PORT OPERATIONS/VTS
(vessel traffic system)
messages about the movement and safety of ships in or
near ports, locks or waterways. In certain major ports,
some channels may be restricted to specific types of
port operations messages.
NAVIGATIONAL/BRIDGE
TO BRIDGE
messages about ship navigation, for example, passing
or meeting other ships, maneuvering through locks,
or navigating around drawbridges. Messages must be
short!
STATE CONTROL messages about government regulation and control,
boating activities, or assistance to ships; also used to
talk to ships and coast stations operated by state or local
governments
DIGITAL SELECTIVE
CALLING
DSC signals only (no voice communications allowed at
any time)
US Marine Channels and Frequencies
Ch No. RX Freq TX Freq Status Name on display
1A* 156.0500 156.0500 Simplex Vessel traffic system/
Commercial
5A 156.2500 156.2500 Simplex Vessel traffic system/
Commercial
6 156.3000 156.3000 Simplex Inter-ship safety
7A 156.3500 156.3500 Simplex Commercial
8 156.4000 156.4000 Simplex Commercial
9 156.4500 156.4500 Simplex Non commercial
10 156.5000 156.5000 Simplex Commercial
11 156.5500 156.5500 Simplex Vessel traffic system
12 156.6000 156.6000 Simplex Vessel traffic system
13 156.6500 156.6500 Simplex, 1W Bridge to bridge
14 156.7000 156.7000 Simplex Vessel traffic system
15 156.7500 Inhibit Receive Only Environmental
16 156.8000 156.8000 Simplex Distress, Safety, Calling
17 156.8500 156.8500 Simplex, 1W Govt maritime control
18A 156.9000 156.9000 Simplex Commercial
19A 156.9500 156.9500 Simplex Commercial
20 161.6000 157.0000 Duplex Port operation
20A 157.0000 157.0000 Simplex Port operation
21A 157.0500 157.0500 Simplex Coast guard only
22A 157.1000 157.1000 Simplex Coast guard
23A 157.1500 157.1500 Simplex Coast guard only