no objective. >> what are differences in the depths of where flight 370 crashed, ocean depth, and java sea. >> huge. i mean we're talking in the area which was about 1,300 miles off the coast of the australia, depths in excess of 10,000 12,000 feet. big trenches. the last area we were looking at where we concentrated on the uav search, there was a 31-day period of gps pings on black box and once that runs out, we're trolling the huge area with uavs. some weren't even equipped to go down to the depths they were talking about. java sea, 150 meters. that aspect of the search will be a lot easier. >> we'll get a live report from singapore. also ahead, they were comeicons.