Someone mentioned "kumbi" earlier.... Oh how I don't miss the nightmare that is the terrible RT by the Egyptians in this area, if they managed to get a call out of any nature odds are Egyptian RT will have ignored it or someone else stepped on it, Egyptian RT has IMHO been an accident waiting to happen for some time, this may not be attributable in this incident but I pity and investigators listing to Egyptian RT tapes, it must be a form of torture !
Will be interesting to see if once they checked in if they were given any clearance to change level, as in the barometric change theory posted earlier.