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2. Marine VHF radio - Wikipedia

   en.wikipedia.org/wiki/Marine_VHF_radio

   A standard handheld marine VHF, mandatory on larger seagoing vessels under the GMDSS rules A VHF set and a VHF channel 70 DSC set, the DSC on top A vintage (76-89) marine VHF radiotelephone. 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 ...

3. List of United States Coast Guard radio stations - Wikipedia

   en.wikipedia.org/wiki/List_of_United_States...

   Besides broadcast messages, Coast Guard stations handle direct traffic between aircraft, cutters, boats, and shore stations on VHF, MF, and HF frequencies, including the HF Data Link encrypted e-mail system and Digital Selective Calling (DSC), which uses radio telephone to send digitally encrypted signals to either one receiver or a group or ...

4. Maritime mobile amateur radio - Wikipedia

   en.wikipedia.org/wiki/Maritime_mobile_amateur_radio

   A handheld amateur VHF radio transceiver ready for "maritime mobile" use on a 28' yacht. For VHF and UHF operation, one option is to mount a small Yagi antenna to a pole 1–2 m (3–6 ft) long and haul this to the masthead using a flag halyard. If the halyard is correctly knotted to the middle and bottom of the pole, it is easy enough to make ...

5. 2182 kHz - Wikipedia

   en.wikipedia.org/wiki/2182_kHz

   2182 kHz is analogous to channel 16 on the marine VHF band, but unlike VHF which is limited to ranges of about 20 to 50 nautical miles (40 to 90 km) depending on antenna height, [3] communications on 2182 kHz and nearby frequencies have a reliable range of around 50 to 100 nautical miles (90 to 190 km) during the day and 150 to 300 nautical miles (280 to 560 km) or sometimes more at night.

6. Coast radio station - Wikipedia

   en.wikipedia.org/wiki/Coast_radio_station

   A coast (or coastal) radio station (short: coast station) is an onshore maritime radio station which monitors radio distress frequencies and relays ship-to-ship and ship-to-land communications. A coast station (also: coast radio station ) is – according to article 1.75 of the International Telecommunication Union's (ITU) ITU Radio Regulations ...

7. Radio spectrum - Wikipedia

   en.wikipedia.org/wiki/Radio_spectrum

   2182 kHz is a medium-wave frequency still used for marine emergency communication. Marine VHF radio is used in coastal waters and relatively short-range communication between vessels and to shore stations. Radios are channelized, with different channels used for different purposes; marine Channel 16 is used for calling and emergencies.