hier:
https://www.aviationhf.com/products/
Das Problem ist, dass das HF Radio in Deinem Flieger auch funktionieren muss. Und da beginnen erfahrungsgemäss die Probleme.
ICAO NAT DOC 007 V.2018-1
"Flights Planning to Operate Without Using HF Communications
4.2.18 The carriage of functioning HF communications is mandatory for flight in the Shanwick OCA, even if the pilot intends using alternative media for regular ATS air-ground contacts. Aircraft with only functioning VHF communications equipment should plan their route outside the Shanwick OCA and ensure that they remain within VHF coverage of appropriate ground stations throughout the flight. Theoretical VHF coverage charts are shown in Attachment 5. Such strict routing restriction may not apply in all NAT Oceanic Control Areas. Some may permit the use of SATCOM Voice to substitute for or supplement HF communications. Details of communication requirements by individual NAT ATS Providers are published in State AIPs. However, it must also be recognised that the Safety Regulator of the operator may impose its own operational limitations on SATCOM Voice usage. Any operator intending to fly through the NAT HLA without fully functional HF communications or wishing to use an alternative medium should ensure that it will meet the requirements of its State of Registry and those of all the relevant ATS Providers throughout the proposed route."
