Diver 1st Class Mark Sawyer, assigned to Mobile Diving and Salvage Unit 2, Co. 21 based in Virginia Beach, Va., places a ratchet strap across a large patch that will be used to seal one of the escape hatches of the sunken former Soviet submarine Juliett 484 at the bottom of the Providence River. U.S. Navy and Army divers and with federal, state, and local authorities are participating in a joint service operation to raise the submarine from the water at Collier Point Park in Providence, R.I.