The USS Kittiwake was a US Navy submarine rescue ship built during WWII, and commissioned on July 16, 1945. Decommissioned in 1994, the Kittiwake was sunk early in 2011 as an artificial reef just off the island of Grand Cayman in the Caribbean Sea.
Though not a warship - in comparison to most modern corvettes and other such vessels the Kittiwake certainly ranks as good sized.