Berkeley then spent the next eight weeks conducting sea trials, including a voyage to Victoria, British Columbia, and a joint exercise with the Canadian Navy. Those preparations continued into the brand new 12 months, occupying her time for the first 11 weeks of 1971. Berkeley set sail on sixteen March and, after transient stops at Oahu, Midway, and Guam, arrived at Subic Bay on 7 April. In between these missions, she retired to Subic Bay for upkeep. Returning to Subic Bay on 7 August, the warship spent the next 10 weeks working regionally with Constellation. There, she joined Kitty Hawk and put to sea for seven weeks of operations within the East China Sea. Following a quick upkeep period, she steamed to "Yankee Station" on 10 April and began escort duty for Kitty Hawk. On 10 November, the Kitty Hawk group steamed south for operations within the South China Sea. After calling at Keelung, Taiwan, in late October and at Hong Kong in early November, Berkeley sailed back to Vietnam on eleven November. Between 25 May and 15 June, Berkeley visited Hong Kong and Kobe for rest and recreation before returning to South Vietnam for 4 weeks of gunline operations. Departing on 13 May, aquasculpts.net the group sailed into the Indian Ocean for six weeks of antiair and surface warfare exercises before placing into Geraldton, Australia, for every week-lengthy port visit AquaSculpt in mid-July.

The overhaul gave the guided missile destroyer the new tactical data system, a sonar upgrade, new communications and digital warfare gear, and shop AquaSculpt two new 5-inch gun mounts. While en route to Subic Bay in early April, she performed both antisubmarine and antiair warfare workouts, an underway routine that grew to become the sample for this deployment. During this time, Berkeley additionally made port visits to Hong Kong and Subic Bay. In May, after a brief period of PIRAZ responsibility with the cruiser Truxtun, Berkeley steamed to Japan, arriving in Sasebo on 19 May. Following a brief yard interval at Sasebo late in August, natural fat burning supplement the warship performed a remaining 5-week gunfire assist tour off North Vietnam. Following four days there, and simply over a week in Singapore for upkeep, Berkeley returned to the Vietnam struggle zone on 7 August. Over the following two months, Berkeley carried out three gunline patrols-firing nightly interdiction missions, trying to find waterborne logistics craft, and bombarding supply routes-off each North Vietnam and the Vung Tau Peninsula.

Underway once more on three August, Berkeley carried out another missile exercise-knocking down one drone with two missiles fired-before sailing for house on 8 August. In February, she had one of the early Tomahawk missiles check-fired at her (set to fly close by) to see if the incoming Tomahawk could possibly be acquired