Military simulation and training systems are the simulators and instrumented ranges on which soldiers and pilots train, together with the battlefield radios that link them. Training with real weapons is dangerous and costly. These systems let people practise realistic exercises without live fire.
Take, for example, an infantry battalion that must practise clearing a village. Live fire inside a village is impossible, and a single anti-tank missile can cost ₹20 lakh or more. On an instrumented range, every soldier and every vehicle carries equipment that records what happens. The equipment replaces bullets and shells with harmless signals, and the system decides who was hit. After the exercise, the trainers replay everything on a screen and explain each mistake. The same exercise can be repeated the next day, at little extra cost.
For pilots, a flight simulator copies the cockpit and the way the aircraft behaves, so that crews practise emergencies safely. The training for flying uses copies of real avionics screens and controls.
The radios matter as much as the sensors. Soldiers in training use the same kind of tactical radios as in the field, so they also practise using the radios. The radios send each soldier's position and hits to the control room. A system that works only if the radios work is a real test of them.
These systems are built from defence electronics. Armed forces buy them through government tenders. They are used for decades, and the maker updates them when the force changes its weapons or its tactics.