My sincere condolences to the families. May those on board rest in peace.
Back on page 3 there was a mention of the possibility that the remaining personnel on the rig spotted an explosion on the aircraft. Has this been at all verified? Was the crash site close to the rig? Within sight? Is this why rescue teams were so quickly notified despite the absence of a mayday?
Also, was the accident on the way back from the rig, or the way too it?