In May 1945, Lyle Jorenby left Boston on the newly commissioned cruiser USS St. Paul serving in the rank of Fireman First Class.
From the U.S. Military History site:
USS Saint Paul, an 13,600-ton Baltimore class heavy cruiser, was built at Quincy, Massachusetts, and commissioned in February 1945. She went to the Pacific following shakedown and participated in final operations against the Japanese home islands in July and August 1945, including firing her eight-inch main battery guns at targets ashore at Hamamatsu and Kamaishi.Saint Paul was present in Tokyo Bay when Japan formally surrendered on 2 September 1945. She supported occupation activities in Japan until November, when she went to Chinese waters, where she continued to serve until late in 1946.
Source: http://www.history.navy.mil/photos/sh-usn/usnsh-s/ca73.htm; viewed on 7 December 2013.