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There now looking? >> it does the same thing as far as collecting sonar images. but it is a towed array. meaning you have to let it out on a cable. and if its three miles deep, its going to have to let over ten miles of cable out to get to the bottom and tow it. >> so it can get stuck on things? >> if the terrain down there is rough, it doesnt view the bottom as well. it doesnt contour to the bottom where the auv will stay with the bottom and get you much better imagery. and it does have trade-o...