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The frequencies which would have been the second frequencies on half-duplex channels are not used for marine purposes and can be used for other purposes that vary by country. For example, 161.000 to 161.450 MHz are part of the allocation to the Association of American Railroads channels used by railways in the US and Canada.
A similar broadcast on MF is initially announced on 2182 kHz, with a further frequency specified, e.g., 1770 kHz. VHF optimum range is approximately 30 nautical miles (nmi), effectively line of sight, whereas MF range is much greater at approximately 150 nmi, allowing ships in the Atlantic Ocean and North Sea to receive the broadcast.
Each serves to allocate responsibility for sending Marine and Safety Information (navigational warnings) to ships at sea, as part of the Global Maritime Distress and Safety System (GMDSS). A list of Navtex stations. Please improve this list by determining the exact location of the transmission antenna! Station broadcast ranges are in nautical ...
An amateur radio installation on a 28' yacht, including 100W HF transceiver with microphone, manual antenna tuner, and morse key. Maritime mobile amateur radio is an amateur radio transmission license that allows maritime operators to install and use radio while they operating at sea.
Channel 16 VHF (156.800 MHz) is a marine VHF radio frequency designated as an international distress frequency. [1] Primarily intended for distress, urgency and safety priority calls, the frequency may also carry routine calls used to establish communication before switching to another working channel.
UK Marine Radiofax Broadcast, received on April 24, 2024 A decade after the introduction of radiofax National Weather Service (NWS) began transmitting weather maps using the radiofax technology. The NWS named this new service weatherfax ( portmanteau word from the words " weather facsimile ") The cover of the regular NOAA publication on ...
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.
Several 27 MHz marine transceivers sold in Australia are also available in South Africa (programmed for the South African 29 MHz frequencies). This allows for one transceiver to be sold in both Australia (27 MHz marine frequencies) and South Africa (29 MHz marine frequencies). 29.7100 MHz – Mobile (AM) 29.7225 MHz – Mobile (AM)