• The Indian Air Force has deployed its three S-400 air defense missile squadrons along borders with China and Pakistan.
• Indian and Russian officials are set to meet to discuss the final delivery schedule for the remaining two squadrons.
• India had signed an over ₹ 35,000 crore contract with the Russian side in 2018-19 for five squadrons of the S-400 missiles.

ABOUT S-400

• The S-400 Triumf (or SA-21 Growler) is a mobile, surface-to-air missile system.
• It is one of the world’s most advanced air defence systems that can simultaneously track numerous incoming objects.
• Developed by – Almaz Central Design Bureau of Russia.
• The first S-400 was deployed in combat in August 2007.
• It has command and control centre, automatic tracking and targeting systems, launchers and support vehicles.
• It is equipped with four different missiles that can engage enemy aircraft, ballistic missiles, and AWACS planes at 400 km, 250 km, the medium-range 120 km and the short-range 40 km.
• Radars fitted into this system can detect incoming objects from a distance of 400 kilometres and an altitude of 30 kilometres.
• The system can simultaneously engage 36 targets.