The spectrum for HF Aero communications is very wide.
Transcribed Weather Broadcasts (from William Hepburn DX Information Center).For a list of all Aero services (including VOLMETs and RDARAs), see the International HF Aero Frequency List.UDXF Files page See the Aero / Maritime section.When a hurricane (cyclone in the Pacific) is spotted, the Tropical Cyclone Plan of the Day will give you an idea of when the flights to track these storms will take place.Aeronautical Enroute and Aeronautical Fixed Stations regulations.Also see the ACARS VDL2 reflector on groups.io, which covers HFDL as a sub-group This is also the place to be for logs of stations calling MWARA stations. There is a whole sub-culture of people that use various software packages to copy this mode and track flights which can be found on the Utility DXers Forum group. HFDL, otherwise known as High Frequency Data Link, or HF ACARS, is now used extensively by many commercial airlines. VOLMET Aeronautical stations broadcasting weather worldwide.MWARA frequencies - Aircraft use these stations to communicate over water when out of VHF radio range.Trans-oceanic flights communicate with ground stations via HF for position reports and other purposes. The primary usage of HF is for Trans-oceanic flights.
Aircraft utilize HF communications when VHF (Line of Sight) communications is not sufficient.
