DD9999

DD9999 is a designation that appears in naval terminology and popular culture as a hypothetical or fictional hull number for a destroyer. In the United States Navy, destroyers carry hull classification symbols that begin with DD, followed by a numeric hull number. Modern destroyers include examples such as DDG-1000; a number like 9999 has not been assigned to any commissioned vessel.

Official records do not show a commissioned U.S. Navy ship bearing the hull number DD9999. When used in fiction and speculative media, DD9999 functions as a narrative shorthand for an advanced, experimental, or modular destroyer, rather than as a statement of actual procurement plans.

Beyond naval discourse, DD9999 may also appear as a model or code in entertainment media, games, or design exercises. In these contexts the meaning is not standardized and varies by author. If encountered, the intended definition should be drawn from the specific work’s glossary or documentation.

See also: hull classification symbol; destroyer.