USS Haven (AH-12) was the lead ship of her class of hospital ships built for the U.S. Navy during World War II. Laid down as SS Marine Hawk, she was transferred from the Maritime Commission for conversion to a hospital ship, and served in that capacity through the end of the war. She was redesignated APH-112 in June 1946 for participation in Operation Crossroads, returning to her original AP-12 designation in October 1946. Haven participated in the Korean War and eventually ending her military career acting as a floating hospital in Long Beach, California. She was later converted to a chemical carrier and scrapped in 1987.

The Haven class of hospital ships were built for the United States Navy (USN) during World War II. Haven-class ships also served in the Korean War and the Vietnam War. They were among the first ships to be able to receive casualties directly by helicopter and were the first fully air conditioned ships in the USN. The first ship was laid down in July 1943, while the last was launched in August 1944. In that span the United States produced six Haven-class hospital ships. The last Haven-class ship was struck from the Naval Vessel Register in 1989. One ship sank in a collision in 1950; the five others were scrapped. Haven-class hospital ships were replaced with the Mercy-class hospital ships.