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Marine Scanning

Solution The marine band is located between 156 to 158 MHz and again from 160 to 161 MHz. This band is used exclusively for ship-to-shore and ship-to-ship activity for both commercial and non-commercial vessels, including cruise ships.
The VHF marine radio band contains channels numbered 1 through 88. They are spaced 25 kHz apart and are each designated for specific uses. Of particular interest is the Distress and Calling Channel, Channel 16 or 156.800 MHz, used for making contact with passing vessels and for communicating in times of distress. Almost all boats, with the exception of small recreational boats, are required to keep watch on this channel. Once contact has been made, both parties must switch to another appropriate channel. Both parties are required to use the minimum power necessary for the communication, so an outdoor antenna may be of particular help for base-station scanner listeners.
Many customers ask us about the range (distance) over which a radio can communicate and it is the most popular question, with the hardest answer.

Radio travels as waves, similar to light. Like light it can be reflected, reduced or even stopped by other objects. A popular response to the range question is ‘if you can see it you can talk to it’ (known as line-of-sight) and this is generally a good guide.
Because VHF travels in straight lines, like light, as you travel away from land the curvature of the Earth prevents the signal from reaching you. This happens between 35-50 miles offshore.

For frequency information please visit
Because VHF travels in straight lines, like light, as you travel away from land the curvature of the Earth prevents the signal from reaching you. This happens between 35-50 miles offshore.


Because VHF travels in straight lines, like light, as you travel away from land the curvature of the Earth prevents the signal from reaching you. This happens between 35-50 miles offshore.

For frequency information please visit
http://www.coastalradio.org.uk/vhfchann.htm
 
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Article details
Article ID: 30
Category: Radio Scanners
Date added: 2009-09-10 11:47:55
Views: 112
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