CNN CNN Newsroom April 13, 2014 00:11:00
Gps, we can't use radio waves, we have to bring our own light, our own power. and there are no maps. i'm looking forward to the maps that "echo" will produce. i'm sure they will be fabulous. i think that will give everyone a bit of a boost because that will show the underwater terrain in incredible detail and give us some sense of it's a workable place. so these are things, again, that oceanographers deal with, all of these things routinely. i'm not saying it's easy. it's not easy by any stretch of the imagination but it is nothing that we're unfamiliar with. >> all right. we're going to conti...