Truxtun returned to Long Beach on 23 March and launched into a round of inspections and training cruises. In June, the warship embarked 40
NROTC midshipmen for their summer training cruise. During the first part of the cruise, she fired missiles on the Pacific missile range and visited San Francisco and
Seattle. On 13 July, she departed Seattle for Pearl Harbor to conduct the second part of the training cruise. On 29 July,
Truxtun returned to Long Beach from Hawaii, disembarked the midshipmen, and resumed normal operations. For the remainder of the summer, she conducted exercises and underwent various inspections. From 16 to 25 October, she moored alongside for a tender availability. Following one more period of exercises at sea late in October, she entered the Long Beach Naval Shipyard in preparation for a three-month restricted availability which began on 2 November 1970.
Truxtuns yard work was completed in mid-January, she then conducted type training and ASW exercises before preparing to deploy to the western Pacific once more. She returned to Long Beach on 22 January 1971 and remained there until 2 February when she got underway for Pearl Harbor. After a two-day layover in Hawaii, she resumed her voyage to the Far East on 9 February and reached Subic Bay on 20 February. During that deployment,
Truxtun returned to her familiar routine along the coast of Vietnam, standing PIRAZ picket duty and conducting exercises and tests. She visited
Yokosuka, Japan, several times and made single stops at Hong Kong and
Sattahip, Thailand. In late April, she also patrolled the
Taiwan Strait for two days. On 6 July, she completed her final line period of the deployment and left the
Gulf of Tonkin. After a visit to Subic Bay, she set a course, on 10 July, for
Fremantle, Australia, where she spent a week. Following port calls at
Pago Pago,
Samoa, and Pearl Harbor, she moored at Long Beach on 17 August and began post-deployment stand-down. Through the end of September,
Truxtun received visitors on board and conducted drills to improve and to test her missile and gunnery marksmanship. During the first week in October, a Board of Inspection and Survey inspected
Truxtun; and, on 8 October, she began a restricted availability during which she was modified to utilize the Light Airborne Multi-purpose System (
LAMPS). From 18 November to 9 December, the ship conducted post-availability dock trials and type training as well as testing the newly installed LAMPS system. On 14 December 1971, a team from
Naval Air Systems Command inspected and certified
Truxtuns LAMPS installation. During the first six months of 1972,
Truxtun operated out of her home port in North American coastal waters. She conducted exercises, entertained visitors, and underwent several inspections. Following another restricted availability in June, she spent July preparing for her fourth tour of duty with the
U.S. Seventh Fleet. On 13 July, she departed Long Beach with , bound for the western Pacific and for her most eventful series of line periods off Vietnam. She parted company from
Canterbury on 18 July and put into Pearl Harbor the following day. On 23 July,
Truxtun resumed her voyage to the Orient and moored at Subic Bay on 4 August. Four days later, she loaded ammunition and got underway for her first line period in the Gulf of Tonkin. Over the next five months,
Truxtun stood both SAR and PIRAZ picket duty. During these assignments, she evaded at least three typhoons. Her busiest week came between 8 and 15 October, when she directed fighter intercepts resulting in six
MiG kills, three of which occurred on 15 October alone. By the end of her deployment,
Truxtun was credited with directing fighter intercepts which resulted in the destruction of eleven North Vietnamese MiGs and rescue of three downed American pilots, earning the ship her second Navy Unit Commendation. In October, November, and January,
Truxtun briefly joined the Taiwan Strait patrol. She also made port calls at Sasebo, Singapore, Hong Kong, and Yokosuka. On 21 January 1973, relieved her on the north SAR station, and
Truxtun headed, via the Taiwan Strait, for Japan. She stopped at Yokosuka from 26 to 30 January before continuing on, via Pearl Harbor, to Long Beach, where she arrived on Lincoln's Birthday. Post-deployment stand-down took up the ensuing month. On 19 March, she moored alongside and commenced a tender availability which lasted until late April.
Truxtun then resumed operations in and out of Long Beach. In May, she conducted type training off the California coast and naval gunfire support qualifications at
San Clemente Island. On 7 June, the warship began embarking
Naval Academy and NROTC midshipmen for their summer cruise. For the next two months, she trained the midshipmen, carrying them to ports along the west coast as well as to Hawaii. She debarked the midshipmen on 27 July and began preparations for her fifth deployment to the Far East. On 17 August,
Truxtun got underway from Long Beach, bound for the western Pacific. En route, she stopped at Pearl Harbor and reached Subic Bay on 5 September. She punctuated relatively uneventful tours of duty on PIRAZ station in the Gulf of Tonkin with port visits to Sattahip, Singapore, and Manila.
Truxtun also conducted missile exercises and ASW drills. On 9 December, she stood out of Subic Bay, sifted through the
San Bernardino Strait, and headed for home. On Christmas Eve 1973,
Truxtun moored at Long Beach and began preparations for her first complex overhaul. On 25 January 1974,
Truxtun cleared Long Beach for
Bremerton, Washington. Four days later, she entered the Puget Sound Naval Shipyard. There, the warship began a major 18-month overhaul during which her nuclear reactors were "refueled." On 30 June 1975, near the end of that repair period,
Truxtun was reclassified a nuclear-powered guided-missile cruiser and was redesignated
CGN-35. On 31 July, she completed the overhaul and all attendant tests and trials and sailed for San Diego. She arrived in her new home port on 4 August and resumed normal operations in the southern California area. That schedule occupied her for the following 12 months. On 30 July 1976, the guided-missile cruiser headed out of San Diego, bound for the western Pacific. After two weeks of training in the
Hawaiian Islands, she continued her voyage west on 16 August; and, after a somewhat circuitous cruise that took her to
Wellington in New Zealand and
Melbourne in Australia,
Truxtun arrived in Subic Bay on 25 September. She conducted operations in the
Philippines for about a month and then departed Subic Bay on 28 October, bound for the Indian Ocean and participation in Operation "Midlink 76." She arrived in
Karachi,
Pakistan, on 9 November for three days of briefings in preparation for the exercise. From 13 to 21 November, the warship joined in the multinational exercise in the waters off the coast of Pakistan. She returned to Karachi at the conclusion of "Midlink" on the 21st and remained there until the 24th at which time she headed back to Subic Bay. Local operations in the Philippines occupied the remainder of the year. From 4 to 13 January 1977,
Truxtun made a round-trip voyage to Hong Kong and back. She completed READEX 1–77 between 15 and 21 January and then again headed for the Indian Ocean in company with
Enterprise and the cruiser . En route, she and her travelling companions conducted exercise "Merlion III" with units of the Singapore Armed Forces on 25 January.
Truxtun participated in Operation "Houdini" in mid-February and visited
Port Victoria in the
Seychelle Islands. She returned to Subic Bay on 13 March and, four days later, got underway for the United States. After an 11-day non-stop voyage, she reentered San Diego on 28 March. The guided-missile cruiser conducted a four-week restricted availability and then resumed operations along the California coast. For six months, the warship conducted routine independent ship's exercises, gunnery drills, and antisubmarine warfare training. She spent the month of November at the Puget Sound Naval Shipyard undergoing repairs to her nuclear power plant and returned to San Diego on 4 December. For the remaining three weeks of 1977,
Truxtun operated out of her home port. The first three months of 1978 were spent in operations off the west coast in preparation for
Truxtuns forthcoming deployment to the western Pacific. The ship departed San Diego on 4 April and spent the next six months in operations with the 7th Fleet which took her as far west as the Arabian Sea and as far south as
Perth, Australia. During this cruise she also visited Colombo, Sri Lanka, Singapore, Hong Kong, and Pusan, South Korea.
Truxtun returned to San Diego on 27 October. Local operations out of San Diego, following post-deployment stand-down, concluded the year. 1979 'Truxtun' departed San Diego, a brief stop at Seal Beach to unload ammo, then on to Bremerton. This time in Puget Sound Naval Shipyards, the 3" guns amidships were removed and the Harpoon system installed. While being serviced in a floating drydock, extreme diligence was done keeping her screws covered and away from prying eyes. ==1980s and 1990s==