According to the marinetraffic web site the vessel "PMS Burullus" has spent the past 10 hours in a rectangular grid pattern searching an area just 1Km by 400 metres. You have to zoom right in to see the pattern. All done with the vessel pointing NE, which means it has been reversing and crabbing its way around most of the time moving very very slowly.
I wonder if they are "on to something"?
Fingers crossed for the sake of all involved.