Chinese submarines have operated a variety of indigenously designed torpedoes. India recently inducted its second indigenously manufactured combat aircraft. Towed Torpedo Decoy systems or the indigenously developed BEL Towed Torpedo Decoy. The Navy use a mix of indigenously developed and foreign made missile systems. Since the 2000s, Proton has produced a mix of indigenously designed and rebadged models. Saab had initially envisaged powering the "P1150" with the indigenously produced STAL Dovern turbojet engine. RX-420 is the test bed for the entirely indigenously developed satellite launch vehicle. Indica is also considered to have been India's first indigenously developed passenger car. According to Israel, the Harpy is an indigenously designed loitering munitions. The most modern air defense system of the Army is the indigenously developed Antelope. This Porter was replaced by an indigenously developed third generation Porter in March 1996. However the IAF added similar equipment produced indigenously to the aircraft after delivery. Tata Ace, India's first indigenously developed sub-one-ton minitruck, was launched in May 2005. It was the first indigenously designed and produced Turkish automobile. The Proton Waja, the company's first indigenously designed model, was launched in August 2000.