CNN CNN Newsroom April 5, 2014 19:42:00
Pings should stop, you know, if the batteries are dying, and they're about to die out, we do have the coordinates. they have the latitude and longitude of where this was, and i think at this point giving these soundings, gish given thay have this information, they can use side scale sonar and other methods and will certainly map the ocean floor, at least in this area. so they is have this to go on. if these pings turn out to be nothing, and i imagine that the search will go on another 10 or 15 days because the batteries theoretically could last that long. it's not that they automatically stop ...
Source: archive.org