Echo Will Produce News Today

Gps, we cant use radio waves, we have to bring our own light, our own power. and there are no maps. im looking forward to the maps that "echo" will produce. im 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 its a workable place. so these are things, again, that oceanographers deal with, all of these things routinely. im not saying its easy. its not easy by any stretch of the...