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  2. 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.

  3. Marine VHF radio - Wikipedia

    en.wikipedia.org/wiki/Marine_VHF_radio

    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.

  4. Maritime Mobile Service Q Codes - Wikipedia

    en.wikipedia.org/wiki/Maritime_Mobile_Service_Q...

    Can you communicate by radiotelephony (2182 kHz)? I can communicate by radiotelephony (2182 kHz). QOC : Can you communicate by radiotelephony (channel 16 - frequency 156.80 MHz)? I can communicate by radiotelephony (channel 16 - frequency 156.80 MHz). QOD : Can you communicate with me in ... 0. Dutch 5. Italian 1. English 6. Japanese 2. French ...

  5. Distress signal - Wikipedia

    en.wikipedia.org/wiki/Distress_signal

    Transmitting a spoken voice Mayday message by radio over very high frequency channel 16 (156.8 MHz) or medium frequency on 2182 kHz [2] Transmitting a digital distress signal by activating (or pressing) the distress button on a marine radio equipped with Digital Selective Calling (DSC) over VHF channel 70 or over another designated DSC ...

  6. Radio silence - Wikipedia

    en.wikipedia.org/wiki/Radio_silence

    Radio silencing helped hide the Japanese attack on Pearl Harbor in World War II. [9] The attackers had used AM radio station KGU in Honolulu as a homing signal. On June 2, 1942, during World War II, a nine-minute air-raid alert, including at 9:22 pm a radio silence order applied to all radio stations from Mexico to Canada. [10]

  7. 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 ...