In May, she once again departed for the western Pacific for a deployment that lasted seven months, returning home on 22 December. Late in January 1970, "Snook" participated in exercise "Uptide" with other units of the First Fleet. From June through September, she was drydocked at Mare Island Naval Shipyard. Following return to San Diego, the submarine sailed for a six-month deployment with the Seventh Fleet, returning to San Diego on 12 July 1971. "Snook" spent the remainder of the year in port and in operations off the California coast. Operating locally in the San Diego area through the first four months of 1972, "Snook" got underway on 13 May for a two-month tour supporting United States forces in Vietnam and visiting Kaohsiung, Taiwan. Following drydocking at Puget Sound Naval Shipyard, "Snook" got underway on 10 January 1973 for her eighth deployment with the Seventh Fleet. During this deployment, "Snook" visited Pearl Harbor and Guam. She returned to San Diego on 16 June and began a four-week, postdeployment leave and upkeep period, followed by another four weeks engaged in sonar evaluation tests. On 26 November, following her participation in COMTUEX 12-73, "Snook" entered Mare Island Naval Shipyard to begin a refueling overhaul. "Snook" was decommissioned and stricken from the Naval Vessel Register on 14 November 1986. ex-"Snook" entered the Nuclear Powered Ship and Submarine Recycling Program in Bremerton, Washington, and was scrapped between 1 October 1996 and 30 June 1997.