Developments in Navy Diver Underwater Construction

Two Underwater Construction Teams (UCTs), the Navy´s diving Seabees, were established in 1970 to provide a basic underwater construction capability. Over the years the UCT missions have broadened and their capabilities have improved by development of new tools and techniques. Underwater powered tool systems have changed from pneumatic to oil hydraulic, and now include highly portable, lightweight power sources. This paper gives a brief introduction to recent tool developments including seawater hydraulics, electrical safety, grout dispenser, rock drills, navigation and survey, cable tracker, cleaning systems, and inspection and work techniques. These tools and techniques provide for more effective and safe underwater construction and repair.