have to work against the high-power Rajendra, and the aircraft being attacked is not alerted by any terminal seeker on the Akash itself. Design of the missile is similar to that of the SA-6, with four long tube ramjet inlet ducts mounted mid-body between wings. For pitch/yaw control four clipped triangular moving wings are mounted on mid-body. For roll control four inline clipped delta fins with ailerons are mounted before the tail. However, internal schema shows a completely modernised layout, including an onboard computer with special optimised trajectories, and an all-digital proximity fuse. The Akash system meant for the Army uses the T-72 tank chassis for its launcher and radar vehicles. The Rajendra derivative for the Army is called the Battery Level Radar-III. The Air Force version uses an Ashok Leyland truck platform to tow the missile launcher, while the Radar is on a BMP-2 chassis and is called the Battery Level Radar-II. In either case, the launchers carry three ready-to-fire Akash missiles each. The launchers are automated, autonomous and networked to a command post and the guidance radar. They are slewable in azimuth and elevation. The Akash system can be deployed by rail, road or air. The first test flight of Akash missile was conducted in 1990, with development flights up to March 1997. The IAF has initiated the process to induct the Akash surface-to-air missiles developed as a part of the Integrated Guided Missile Development Programme. The Multiple target handling capability of Akash weapon system was demonstrated by live firing in a C4I environment during the trials. Two Akash missiles intercepted two fast moving targets in simultaneous engagement mode in 2005 itself. The Akash System's 3-D central acquisition radar (3-D car) group mode performance was then fully established. In December 2007 Indian Air Force completed user trials for the Akash missile system. The trials, which were spread over ten days, were successful, and the missile hit its target on all five occasions. Before the ten-day trial at Chandipur, the Akash system's ECCM Evaluation tests were carried out at Gwalior Air force base while mobility trials for the system vehicles were carried out at Pokhran. The IAF had evolved the user Trial Directive to verify the Akash's consistency in engaging targets. The following trials were conducted: Against low-flying near-range target, long-range high-altitude target, crossing and approaching target and ripple firing of two missiles from the same launcher against a