the pinger locator to pick up the signals. first at 1,000. then 4,600 feet and then 9,800 feet. >> right. you're in depth, i'm in meters. they first heard is at 300 meters. then once they heard it at 300 meters, they then lowered the tpl, because they need to get further down below. they went to 1,400. then they went to the ideal depth which is 3,000 meters, and at that, they were able to still maintain it for two hours. it's that two hours that houston kept saying is the important thing. what you wanted to hear from different from "haixun 01" you don't just want bursts. you want consistency. now, as you take a look at what they've been showing, once they