USS Mercy ( AH - 4 ) , was built in 1907 as Saratoga .
USS Mercy ( AH - 4 ) , was was commissioned Mercy ( ID - 1305 ) on 24 January 1918 , before being redesignated AH - 4 in 1920 .
USS Mercy ( AH - 4 ) , was built in 1907 as Saratoga and was commissioned Mercy ( ID - 1305 ) on 24 January 1918 , before being redesignated AH - 4 in 1920 .