Hyperveloce,
PS) is there an explanation for the 3 Atlantico requests (for TASIL estimates) that remained unanswered by the AF 447 at 01:36Z ?
Having successfully tested the Selcal, the crew left the audio HF watch, relying on Atlantico -or others on the same frequencies- to contact them via Selcal.
Fly400,
What we do not know is if AF447 attempted to contact DAKAR on HF. And we will not know until the CVR is recovered. It is possible that any attempts to contact DAKAR may have been recorded on the ATLANTICO tapes, but we don't have those either.
The calls to Dakar would have been made on 6535 and Atlantico was on the 6649 family. Had Atlantico picked-up some transmissions, they would have reported it.