<P> 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 low - altitude receding target . Following this, the IAF declared that it would initiate the induction of 2 squadrons strength (each squadron with 2 batteries) of this missile system, to begin with . Once deliveries are complete, further orders would be placed to replace retiring SA - 3 GOA (Pechora) SAM systems . In February 2010, the Indian Air Force ordered six more squadrons of the Akash system, taking orders to eight of the type . The Indian Army is also expected to order the Akash system . </P> <P> Nag (Sanskrit: नाग meaning cobra) is India's third generation "Fire - and - forget" anti-tank missile . It is an all weather, top attack missile with a range of 3 to 7 km . </P> <P> The missile uses an 8 kg tandem HEAT warhead capable of defeating modern armour including ERA (Explosive Reactive Armour) and composite armour . Nag uses Imaging Infra - Red (IIR) guidance with day and night capability . Mode of launch for the IIR seeker is LOBL (Lock on Before Launch). Nag can be mounted on an infantry vehicle; a helicopter launched version will also be available with integration work being carried out with the HAL Dhruv . </P> <P> Separate versions for the Army and the Air Force are being developed . For the Army, the missiles will be carried by specialist carrier vehicles (NAMICA - Nag Missile Carrier) equipped with a thermographic camera for target acquisition . NAMICA is a modified BMP - 2 IFV licence produced as "Sarath" in India . The carriers are capable of carrying four ready - to - fire missiles in the observation / launch platform which can be elevated with more missiles available for reload within the carrier . For the Air Force, a nose - mounted thermal imaging system has been developed for guiding the missile's trajectory "Helina". The missile has a complete fiberglass structure and weighs around 42 kg . </P>

Which is not part of indian missile system