On 20 November 1970, after being re-commissioned having received a major overhaul of radar, sonar and anti-air and anti-submarine warfare weapons systems making
Gridley the first ship of her class to be outfitted with
NTDS. With stops at Pearl Harbor, Subic Bay, Yokohama, Yokosuka and Sasebo. Served as "shotgun" for the aircraft carriers , USS
Constellation and in the Gulf of Tonkin. In 1972,
Gridley was the first ship of the class to be fitted with digital missile fire control systems providing her with the capability to fire Standard Missile Type 2. Several years later, the 3 in/50s were replaced by 8 AGM-84
Harpoon missiles and 2
Phalanx CIWS were added.
Gridley was reclassified as a guided missile cruiser with
hull classification symbol CG-21 on 30 June 1975. That year, she provided air traffic control and on-station support during "
Operation Frequent Wind", the evacuation during the collapse of
South Vietnam.
Gridley was also on-station air traffic controller during the
Mayagüez incident.
Gridley was based in Subic Bay, Philippines, during the 1975 Westpac. During the 1975 year,
Gridley appears to have been part of
Cruiser-Destroyer Group 3. In 1976,
Gridley made a Westpac tour. During her trip across the Pacific,
Gridley transited the 180th parallel (the
International Date Line) at midnight 3 July.
Gridley went directly from 3 to 5 July, resulting in her crew being the few Americans to miss the 200th anniversary of Independence Day. (
Gridley celebrated the missing 4 July upon crossing the dateline in December, when an extra day is gained.) During the 1976 Westpac,
Gridley was based in Yokosuka, Japan. On 21 August 1976,
Gridley was involved in the fallout of
Axe Murder Incident. This involved the murder of two U.S. Army officers by North Korean soldiers.
Gridley was in-port in Yokosuka, Japan when this event happened; by the next morning the entire battle group was underway and stood off the coast of Korea for nearly a month. ==1980s==