No, I never said they had no clue. Read my post again. I was refuting your point they had a "good idea" of where the plane fell into the water. They only had some general idea of where it COULD have crashed and they obviously couldn't narrow it down to a small area. The Indian Ocean is HUGE. They just knew it was somewhere west of Perth but that patch of seawater and arc they determined and later scoured is massive, distant and it isn't easy to spot floating debris either. It would have been amazing, but not very likely for them to find it. Having said that I did expect them to find it eventually, but what do you expect when the search radius was so large and large ocean currents swayed the debris around? Made searching harder because it's not like the debris would be lying in the same place for 3 years. I thought some experts could have done some analysis to determine the most likely crash landing spot based on the debris they found in Africa, but even that appears to be very difficult. Also, a lot of the extra cost was because of bathymetry.