USS Point Defiance (LSD-31) was a Thomaston-class dock landing ship commissioned into the United States Navy in 1955. Constructed by Ingalls Shipbuilding in Pascagoula, Mississippi, she was laid down on November 23, 1953, launched on September 28, 1954, and officially commissioned on March 31, 1955. The vessel featured the typical design characteristics of the Thomaston class, designed to transport and launch amphibious vehicles, troops, and equipment for Navy and Marine Corps operations. Following her shakedown in the Gulf of Mexico, Point Defiance arrived in Long Beach, California, to join Amphibious Squadron 7 of the Pacific Fleet. Throughout her service, she participated in numerous operational deployments, including two to the western Pacific, supporting Cold War and Vietnam War operations. Notably, she was among the first surface ships to support the 1958 International Geophysical Year by firing Nike-Asp sounding rockets during a solar eclipse expedition in the South Pacific. Her operational history includes participation in large amphibious exercises such as Operation Twin Peaks in 1959, and Operation Blue Star in 1960, which involved joint amphibious operations with Chinese Nationalist Forces. She also took part in Operation Sea Hawk with the Republic of Korea forces. In 1962, she transported the bathyscaphe Trieste for deep-sea research into the loss of the USS Thresher. During the Vietnam War, Point Defiance performed multiple landings and salvage operations, including rescuing survivors from a B-52 collision and participating in Operation Starlite, an amphibious assault at Van Tuong. Decommissioned on September 30, 1983, and struck from the Naval Vessel Register in 1992, her later years saw her transferred to the Maritime Administration’s reserve fleet. In 2011, she was sold for scrap and dismantled at Brownsville, Texas. Throughout her nearly three decades of service, USS Point Defiance played a significant role in amphibious warfare, Cold War operations, and Vietnam conflict support, exemplifying the versatility and enduring utility of the Thomaston-class dock landing ships.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.