as it descended the Mariana Trench to a near-record dive, of on 30 June 1960. Supporting various causes Following her support of this scientific endeavor, Haverfield conducted antisubmarine and search and rescue patrols among the Bonins, the Marianas, and the Caroline Islands. For almost five years she served primarily in the Trust Territory of the Pacific, though twice she deployed to the Far East. Steaming to Japan in October 1960, she became the first radar picket escort ship to operate with the U.S. 7th Fleet in the Western Pacific. In mid-October 1961 she returned to the Far East; and, upon relieving on patrol in the Formosa Strait, she became the first of her type to join in this important peace-keeping operation. She continued intermittent patrols off Taiwan until 10 January 1962 when she steamed via Japan to resume patrol duty out of Guam. In November 1962, Typhoon Karen left widespread destruction on Guam and Haverfield, the first ship to return to storm-wracked Apra Harbor, provided valuable supplies and services in the relief and recovery effort. Vietnam operations Haverfield returned to Pearl Harbor March 1965 and, after joining Escort Squadron 5, sailed on 19 June 1965 for duty off of South Vietnam. There she participated in Operation Market Time patrols to guard against the infiltration of North Vietnamese troops and supplies to Viet Cong irregulars in South Vietnam by sea. She served on "Market Time" station for seven months, then returned to Pearl Harbor on 2 February 1966. Departing for the Far East 23 May, she resumed "Market Time" operations on 9 June. Eleven days later, she participated in the most significant action of the operation up to that time. A , steel-hulled North Vietnamese trawler , attempting to infiltrate "Market Time" patrols with a large cargo of arms and ammunition for the Viet Cong, was detected by near the mouth of the Cổ Chiên River in the Mekong Delta. A chase and fire fight followed, during which the Coast Guard cutter forced the enemy trawler aground and the enemy abandoned the burning ship. After wiping out enemy shore resistance, "Market Time" units, including Haverfield, sent volunteers on board to fight fires and salvage the captured cargo. While American and South Vietnamese teams extinguished the fires, other volunteers offloaded almost 80 tons of ammunition and arms, including mortars, recoilless rifles, machine guns, and antitank weapons. This represented the largest seizure of