LST 603 featured in a WW2 movie the LST story produced by the coast guard.
LST-603 was laid down on 5 November 1943 at Seneca, Illinois, by the Chicago Bridge and Iron Company. Her Ship naming and launching was on 14 March 1944, sponsored by Mrs. Etla N. Hobart, and commissioned on 5 April 1944.
During World War II, LST-603 was assigned to the European Theater of Operations. She participated in Operation Dragoon, the invasion of southern France, in August and September 1944.
Following the war, she served in the Amphibious Force, United States Atlantic Fleet, including one deployment to the Mediterranean in 1950. She was decommissioned on 12 May 1955. On 1 July 1955, while out of commission, she was renamed USS Coconino County (LST-603).
Coconino County was recommissioned on 8 June 1966 for Vietnam War service, and operated in the Vietnam theater from 1966 until she was transferred to the Republic of Vietnam Navy on 4 April 1969.
In South Vietnamese service, she served as RVNS "Vung Tau" (HQ-503). South Vietnam collapsed in April 1975, where she was taken over by the Vietnam People's Navy and continues to be used as a training vessel.
Captured by the North Vietnamese around the time of the fall of Saigon, the ship was placed in service with the Vietnamese People's Navy
LST-603 received one battle star for World War II service, and Coconino County received six campaign stars and two awards of the Meritorious Unit Commendation for Vietnam War service.