capable of carrying external fuel tanks for additional range or endurance. No additional armament is typically fitted. Operational history In January 2000, the first production standard OH-1 was delivered to the JGSDF. The OH-1 is slated to replace the Hughes OH-6D, which remains in service as the primary aircraft in this role. Variants XOH-1: Prototype version OH-1: Production model, used as an observation helicopter AH-2: Proposed attack helicopter derivative that would have featured uprated engines and additional anti-tank armaments; rejected in favour of Boeing AH-64 Apache. Operators Japan Ground Self-Defense Force Specifications (OH-1) See also References Citations Bibliography Aoki, Yoshimoto. "Kawasaki OH-1". World Air Power Journal. Volume 38, Autumn/Fall 1999. London:Aerospace Publishing. . . pp. 36–45. Jackson, Paul (ed.) Jane's All the World's Aircraft 2007–2008. Coulsdon, UK: Jane's Information Group, 2007. . Taylor, Michael J.H. Brassey's World Aircraft & Systems Directory 1999/2000. London:Brassey's, 1999. . External links Official JGSDF page Kawasaki Aerospace Division OH-1 page TS1engine | Mitsubishi Heavy Industries, Ltd. 1990s Japanese military reconnaissance aircraft Military helicopters Fantail helicopters OH-1 1990s Japanese helicopters Twin-turbine helicopters Aircraft first flown in 1996