About USS San Juan (SSN 751)

USS San Juan (SSN-751), a Los Angeles-class submarine, is the third ship of the United States Navy to be named San Juan, though only the second named for San Juan, Puerto Rico. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 30 November 1982 and her keel was laid down on 9 August 1985. She was launched on 6 December 1986 sponsored by Mrs. Sherrill Hernández, wife of VADM Diego E. Hernández and commissioned on 6 August 1988.

San Juan was the first of the Flight III or 688i for "improved" design that received a number of significant improvements to the previous boats in the class. Improvements include acoustic quieting, incorporation of an advanced AN/BSY-1 sonar suite combat system, and a strengthened sail, enabling the ability to break through ice.