Transcripts for CNN Wolf 20140407 17:07:00

>> first, you have to reacquire and try age late the location of the boxes. then you've got to drop down the remote vehicles and that is more difficult than it sounds. it's not as though they're going to run down and hit it on the first run and they may decide to do side scanning sonar which is, again, a very tedious process of mapping the debris field. so it could be weeks away before we know. >> if that beacon only -- the battery's about to go out, we're told, let's say the battery's got a few more days left. with a little luck, maybe it does. if the ping locator is within two or three miles, how difficult should it be to find that, if it's 2 or 3 -- because that's the range of what the beeping would be detectible. >> the device being towed by the ship, it may be a long way behind the ship, and it doesn't have an exact way to mark that spot. they have to come back around several times and reacquire the signal. >> just because you're hearing a