So the satellite info pointed them in the right direction or so it would seem.
With the raft being waterlogged I would expect it to be influenced primarily by currents... however an empty raft would be under the influence of the wind
... with no human ballast the 'ballast pockets'(?) under the hull
would have little effect... if there were strong winds in the area.
I think it was 2009/10 that a singlehanded Argentine yacht was lost
on that same bit of coast... a fixed wing aircraft had located the yacht and there was a photo
( published ) of the sailor getting into his raft... sadly neither he or his raft were ever seen again.