`` Spruance '' was sunk on 23 March 2005 and then defeated on 8 December 2006 as a target . `` Spruance '' was sunk on 23 March 2005 and then was decommissioned as a target on 8 December 2006 . `` Spruance '' was decommissioned on 23 March 2005 and then was sunk as a target on 8 December 2006 .