the hms echo, though, it s got a two-mile-wide coverage. it s not high resolution like the bluefin submersible, but way broader brush strokes, if you like, and much faster. we ve talked before about the silted bottom down there. perhaps meters of silt at the bottom. that would give off this echo from hms echo would give a soft signal back, if you like. now, that means that if there is a plane down there or wreckage down there, it would give off a hard signal. so it s obviously out there to sort of help now that we know those pings are in that area. going to go do broad brush strokes and see if they can found wreckage. meanwhile, the other ships are a few hundred miles from the west where experts think any debris from the suspected crash site would have drifted over the weeks since mh-370 disappeared, wolf. michael holmes on the scene for us in perth. thank you. we also have new compelling details of what may have happened in the first few hours