122 mm SMK round intended for marking enemy sites and targets; creating obscuration smoke screening to cover up friendly troops and facilitate their tactical deployment for action.  The smoke screen is also intended to neutralize the enemy observation means.  As a secondary effect, it may be used to cause fire within the enemy positions, destruction of flammable structures and facilities, fuel and lubricant materials storage facilities.

The partial variable charge makes it possible to achieve several muzzle velocity values.