Going back to this lovely map with the arcs and the concentric range circles (
http://tmfassociates.com/blog/wp-con...H370_Mar17.jpg) where on each arc would the aircraft had reached if it just continued flying at its last known speed?
Would the point of intersection of the southern arc and a circle representing range at last known speed be around the same area the Australians and Kiwis are currently searching?