Tools of the Deep You may have worked outside in the rain but you've probably never taken your circular saw underwater. These U.S. Navy Mark XII divers did, however, when they became undersea "carpenters" in a marine project they undertook. You might expect that tools used underwater would be very different than the ones you use at your site. But according to Ray Klackel of Sub-Sea International, Inc. (an underwater contractor located in New Orleans), "you usually use the same tools you'd use above water. You just have to do a regular cleaning to maintain the tool." After use underwater, tools are rinsed up on deck with fresh