What type of aquatic unit is XXX?
USS LST-484
USS LST-484 was an LST-1-class tank landing ship built for the United States Navy during World War II. LST-484 was laid down on 28 September 1942 at Richmond, California by Kaiser Steel; launched on 2 January 1943 and commissioned on 23 April 1943.
LST-1-class tank landing ship