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  2. Maritime mobile amateur radio - Wikipedia

    en.wikipedia.org/wiki/Maritime_mobile_amateur_radio

    These antenna configurations are more common on merchant ships. 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 ...

  3. 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 ...

  4. Antenna types - Wikipedia

    en.wikipedia.org/wiki/Antenna_types

    Inevitably some antennas won't conveniently fit into any one basic type, so the last section on real antennas is an "everything else" category for a few peculiar antennas that don't fit cleanly into any of the categories or subcategories used in this article; for example, random wire antennas and antennas that are laid down on the ground ...

  5. Digital selective calling - Wikipedia

    en.wikipedia.org/wiki/Digital_Selective_Calling

    For VHF, DSC has its own dedicated receiver for monitoring Channel 70, but uses the main VHF transceiver for transmission. However, for the user, the controller is often a single unit. [ 1 ] MF/HF DSC devices monitor multiple bands for distress, urgency and safety sécurité transmissions in the 2, 4, 6, 8, 12 and 16 MHz marine bands.

  6. Automatic Transmitter Identification System (marine) - Wikipedia

    en.wikipedia.org/wiki/Automatic_Transmitter...

    Radio transmitter with a label indicating it will identify any transmisssions from it as coming from "PF7297" using the ATIS protocol [1] The Automatic Transmitter Identification System (ATIS) is a marine VHF radio system used and mandated on navigable inland waterways in Europe for identifying the ship or vessel that made a radio transmission.

  7. List of amateur radio transceivers - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio...

    FT-857 FT-857D. The Yaesu FT-857 is one of the smallest MF/HF/VHF/UHF multimode general-coverage amateur radio transceivers. [46] The set is built by the Japanese Vertex Standard Corporation and is sold under the Yaesu brand. [47] The FT-857 is developed on the FT-897 and MARK-V FT-1000MP transceivers. [46]