High Quality Content by WIKIPEDIA articles! The third USS Pigeon (ASR–21) was the lead ship of her class of submarine rescue ships. Laid down on 17 July 1968 by the Alabama Dry Dock and Shipbuilding Co., Mobile, Alabama, the ship was launched on 13 August 1969, sponsored by Mrs. Allen M. Shinn, wife of Vice Admiral Shinn, Commander Naval Air Force, U.S. Pacific Fleet, and commissioned on 28 April 1973. She was a sister ship to USS Ortolan (ASR-22).