Quote:
Originally Posted by Matt_L
Heres the thing.
If it was out of vhf range at time of reporting severe turbulence and if over water and oceanic im assuming then only HF radio wouldve been available to use. For those who dont know High Frequency is the form of radio used for oceanic crossings and we have Brisbane Flight Service Station (FSS) here, theres Nadi FSS I believe and Oakland for West Coast USA.
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Yes VHF radio is line of sight capable only , and without retransmission is usable up to around 250 miles distance , however , in this instance , it's possible that the aircraft was CPDLC ( Controller Pilot Data Link Communication ) equipped , and as such HF radio would have been a secondary mode of radio communication , and certainly not the sole method available .