Apologies ana1936 - your post crossed mine. I was interested also in the fact that the first search area, for which I haven't seen a map, was north and west of Cocos Islands. Now they have moved to the published SAR which is where the blue and red circles intersect. It just does bring up the question that they have chosen currently to eliminate waters closer to WA, which is likely not to be coincidental.
Thanks for your work on the mapping by the way - extremely helpful.