Out of curiosity, does anyone have any idea about how emphatic the BEA can be when they say that the Seabed Worker has not found anything? Presumably the side scan sonar recordings made by the AUVs will subject to further reviews onshore in case the initial viewings have missed something?
Hopefully before the next search phase in the autumn (Figaro article) the BEA and the french navy will get their acts together to better understand and interpret the Emeraud's recordings - if they really did "hear" the AF447 pingers then this should allow a better targetted search than the current crop spraying approach.