CNN The Situation Room January 5, 2015 23:24:00
One reason is the weather. the heaveing waves make it less stable and can damage it. another factor the noise. >> in this area the water is so shallow you can't get away from the noise of the ship dragging whatever instruments so the ship is making noise, the waifs make a lot of noise and the waves make a lot of noise and all of that -- now you're trying to listen for a whisper. >> reporter: if the locator is not effective or can't be used or if searchers already know where to look a side scan sonar which map debris could help find them. search teams in the java sea are already using that. >> ...
Source: archive.org