Ugroza
Ugroza is a precision-guided weapons system developed by the Russian Federation. It is an upgrade for standard Russian "dumb" rockets, including the S-5, S-8, and S-13 rockets. The system upgrades the "dumb" rockets with laser guidance, very significantly increasing their accuracy. It requires a laser target designator, from either an airborne or land based source, to "paint" a target. Circular error probable is about 0.8 to 1.8 m, while maximum ranges of rockets varies from the rockets used 1.5–8 km. Ugroza allows rockets to be ripple-fired up to 7 at a time.
The notable novelty is that the system does not use aerodynamic flight control, but impulse steering with mini-thrusters. It has been dubbed as the Russian concept of impulse corrections.
The concept has been demonstrated by Ametech on 1999 MAKS airshow, but it is not known if the system has been manufactured since, and in what numbers. The name Ugroza, have been first used for the company's semi-active laser-guided projectile for the 122 mm BM-21 Grad series of multiple rocket launchers.
Sources are not clear whether optical guidance can be used in place of laser guidance.
The designation of rockets upgraded with Ugroza are given the suffix "Kor" :
