The Dictionary of American Naval Aviation Squadrons (DANAS) is a multivolume work published by Naval Historical Center of the U.S. Department of the Navy's Naval History & Heritage Command. It covers naval aviation in much the same way as the Dictionary of American Naval Fighting Ships (DANFS) covers commissioned vessels. Two volumes have been published to date: Volume 1, covering the history of attack and strike fighter squadrons, and Volume 2, covering the history of patrol squadrons. Other volumes are forthcoming. DANAS volumes are available online and as PDF files on CD-ROM.