Commissioned in December 1967,
Haddock underwent sea trials in the
Gulf of Mexico. She transited the
Panama Canal between January and February of 1968, arriving and being
drydocked at
Puget Sound Naval Yard in the spring of 1968. She was assigned to
Submarine Squadron 3 in late 1968 and arrived at her first homeport, San Diego, in 1969. Following a deployment to the
Western Pacific, her
home port was transferred to
Pearl Harbor in time for her first overhaul, which was completed in 1972.
Haddock was awarded the
Meritorious Unit Commendation for significant achievements during her next deployment. Haddock underwent a resupply and refit in 1973 in her new homeport in Hawaii. In 1977,
Haddock had a 19-month overhaul in
Mare Island, following which she was restationed in San Diego, and reassigned to
Submarine Squadron Three. In early 1981,
Haddock participated in Ready Ex-81.
Haddock completed her seventh deployment to the Western Pacific on 23 December 1983. She then went to
Mare Island in October 1984 for her third overhaul and returned to San Diego and Submarine Squadron Three in February 1987.
Haddock earned the Battle Efficiency "E" Award for fiscal year 1988.
Haddock deployed to the Western Pacific for the eleventh time from July to October 1991. :
History needed for 1991–1993. ==Fate==