Naval Academy at Annapolis, Maryland, where her presence allowed about 1000 fourth-classmen to see at firsthand the latest development in submarine design. That fall and winter, Tusk resumed normal operations, participating in exercises with other United States and NATO forces. She ranged from the Caribbean Sea in the south to above the Arctic Circle in the north. The beginning of 1949 brought a more restricted radius of operations. During the first six months of that year, she served with Submarine Development Group 2 based at Newport, Rhode Island. In July, Tusk rejoined the multinational forces of NATO for another round of exercises in the North Atlantic. During these exercises, she visited Derry, Northern Ireland, and Portsmouth, England. Loss of Cochino During the final phase of those exercises, Tusk was operating in a unit which also included the submarine . On 25 August, while steaming through a gale off the coast of Norway, Cochino suffered an explosion in one of her batteries. Tusk rushed to the aid of the stricken submarine, providing medical supplies for Cochinos injured by way of life rafts. One such raft capsized in heavy seas sending a Cochino officer and a civilian employee of the Bureau of Ships into the icy Arctic Sea. Both were recovered, but during the administration of artificial respiration on board Tusk, another wave broke over her deck washing away the civilian and 11 Tusk crewmen. Only four sailors were subsequently rescued. After those tragic events, Tusk and the limping Cochino headed for Hammerfest, Norway. Along the way, another explosion erupted in Cochinos aft battery. The second detonation sealed Cochinos fate. Water poured through her battered hull. Tusk came alongside in heavy seas and lashed herself to the sinking submarine. Under the worst possible conditions, Tusk took all of Cochinos crew off safely. Minutes later Cochino took her final plunge and Tusk headed for Hammerfest. 1950s That fall, the submarine returned to the United States to resume East Coast operations out of New London in support of the Submarine School. She made cruises north to Halifax, Nova Scotia, and south to Bermuda. Her duty with the Submarine School continued until the middle of 1951 when she was assigned once more to Submarine Development Group 2. That assignment, punctuated by regular exercises with the fleet, continued until the summer of 1952 when she returned to an operational unit, Submarine Squadron (SubRon) 10. Normal East