@ Hyperveloce:
Thanks for this link. I checked all this buoys before, too bad that none were drifting at the right place and, as you can see here and even on the SHOM map, this area drift is fairly different North, South, East & West from this place!
On the other hand, the drift is mostly continuous in direction for days (but not the speed) with slight variations until the reversal zone above 5N which is showing erratic and spiral drift. I'm still hoping they will be able to find the wreck soon. The deep sea relief is the main obstacle as they have to use towed sensors listening very close to the bottom.
S~
Olivier