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| Channel name/description | Used for: |
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| PORT OPERATIONS/VTS | messages about the movement and safety of ships in or |
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| (vessel traffic system) | near ports, locks or waterways. In certain major ports, |
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| some channels may be restricted to specific types of |
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| port operations messages. |
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| NAVIGATIONAL/BRIDGE | messages about ship navigation, for example, passing |
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| TO BRIDGE | or meeting other ships, maneuvering through locks, |
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| or navigating around drawbridges. Messages must be |
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| short! |
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| STATE CONTROL | messages about government regulation and control, |
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| boating activities, or assistance to ships; also used to |
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| talk to ships and coast stations operated by state or local |
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| governments |
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| DIGITAL SELECTIVE | DSC signals only (no voice communications allowed at |
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| CALLING | any time) |
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US Marine Channels and Frequencies
Ch No. | RX Freq | TX Freq | Status | Name on display |
1A* | 156.0500 | 156.0500 | Simplex | Vessel traffic system/ |
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| Commercial |
5A | 156.2500 | 156.2500 | Simplex | Vessel traffic system/ |
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| Commercial |
6 | 156.3000 | 156.3000 | Simplex | |
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 |
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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 |
38English
UM380_20101221.indd 38
4/13/2011 11:25:18 AM