What is Cannon-launched guided projectile?

Cannon-launched guided projectiles are precision-guided munitions launched by howitzers, mortars, tank guns, and naval guns. Those projectile main propulsion system is the initial kinetic shoot, directed as much as possible toward the target. A secondary GPS or geocoordinates-based system then corrects the trajectory to increase target accuracy and fall closer to the target. This system relies on electronic guidance and pre-programmed coordinates, submitted to the round before its launch. CLGP are intended to supplement and not supplant conventional rounds, providing additional accuracy when needed. For example, the INVAR missile system on the T-90 MBT.