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Marine VHF radio is a worldwide system of two way radio transceivers on ships and watercraft used for bidirectional voice communication from ship-to-ship, ship-to-shore (for example with harbormasters), and in certain circumstances ship-to-aircraft.
VHF radio is also used for marine Radio [6] as per its long-distance reachability comparing UHF frequencies. Example allocation of VHF–UHF frequencies: [7] Radionavigation 60: 84–86 MHz; Fixed Maritime Mobile: 130–135.7 MHz; Fixed Aeronautical radio navigation: 160–190 MHz; Broadcasting Aeronautical Radionavigation: 255–283.5 MHz
Coast Guard Auxiliary stations are privately owned stations that have been offered for use of the Government and have been approved by the Coast Guard. They may be on the marine VHF band or use HF communications. In addition, many Coast Guard Auxiliarists are qualified radio watchstanders at existing Coast Guard stations.
The Joint Tactical Radio System (JTRS) as a Program of Record evolved from a loosely associated group of radio replacement programs to an integrated effort to network multiple weapon system platforms and forward combat units where it matters most – at the last tactical mile. In 2005, JTRS was restructured under the leadership of a Joint ...
The upper section of HF (26.5-30 MHz) shares many characteristics with the lower part of VHF. The parts of this section not allocated to amateur radio are used for local communications. These include CB radios around 27 MHz, studio-to-transmitter (STL) radio links, radio control devices for models and radio paging transmitters.
A Sailor VHF DSC unit. Digital selective calling (DSC) is a standard for transmitting predefined digital messages via the medium-frequency (MF), high-frequency (HF) and very-high-frequency (VHF) maritime radio systems. It is a core part of the Global Maritime Distress Safety System (GMDSS). [1]
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