Further to post above regarding ACARS message routing, Satcom or HF. The lat/long of the last transmission was provided in the listing. That should have been part of the preamble of every satcom message, showing where the beam was pointing, whereas I believe it would not be part of an HF ACARS preamble.
I've been going blind looking for the most accepted raw picture of the stream of ACARS messages. Does anybody have a quick link?
Thanks,
GB