Gibbs & Cox is a U.S. naval architecture firm that specializes in designing surface warships. Founded in 1922 in New York City, Gibbs & Cox is now headquartered in Arlington, Virginia. The firm has offices in New York City; Washington, D.C.; Newport News, Virginia; Philadelphia, Pennsylvania; and Adelaide, Australia (Gibbs & Cox Australia PTY LTD). In 2003, more than 150 warships built to the firm's designs, including 60 percent of the U.S. Navy's surface combatant fleet, were on active duty in nearly 20 navies. Among the ship classes designed by Gibbs & Cox are: