 Also developed was the 3O8 'Nerpa' cargo mortar round which delivers 14 submunitions fitted with fragmentation warheads which are deployed over the target by miniature parachute, as well as the 'Sayda' incendiary round.In 1983, the capabilities of the weapon were further enhanced with the development of the 1K113 'Smelchak' precision munition system which comprises a 3WF4 round with a 3F5/3W84 projectile that has a range of 9.2 km, weighs 134.2 kg and contains 21 kg of high explosive.The projectile has a seeker head which homes in on reflected laser energy, generated by ground-based 1D15 or 1D20 laser rangefinders.