STOCKTON — After their fishing boat sank some 63 miles off Georgia’s Atlantic Coast, three fishermen made it to a small raft and were rescued by Stockton’s own Nathan Andrade, a 22-year-old sonar technician aboard the U.S. Navy guided missile cruiser USS Hué City.Andrade, a former Bear Creek High and San Joaquin Delta College swimmer, is a trained search-and-rescue swimmer in the Navy.It was about 4 a.m.