Our commercial diving services included underwater photography as well as color video with topside monitor for real time diver directed hull inspections. Repair services include propeller polishing, underwater welding and burning, isolation of sea chests to facilitate waterborne valve removal or inboard repairs. DRS Marine Inc. has a large inventory of cofferdams built to US Navy standards and in addition, we can design and fabricate a cofferdam to meet any specific need. All services can be provided pier side or at anchorage utilizing our fleet of workboats and barges. DRS Marine Inc. has provided dry docking dive support in the San Francisco bay for many years, from building keel blocks and side blocks for coast guard cutters to landing 1,000' cruise liners within an inch, DRS Marine Inc. is proud to be apart of the ship yard industry.