Ugroza (russian: Угроза, meaning "menace") is a precision-guided weapons system developed by the

Russian Federation Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

. It is an upgrade for standard Russian "dumb" rockets, including the S-5, S-8, and

S-13 rocket The S-13 is a 122 mm calibre unguided rocket weapon developed by the Soviet Air Force for use by military aircraft. It remains in service with the Russian Air Force and some other countries. Development The S-13 rocket was developed in th ...

s. The system upgrades the "dumb" rockets with laser guidance, very significantly increasing their accuracy. It requires a

laser target designator A laser designator is a laser light source which is used to designate a target. Laser designators provide targeting for laser-guided bombs, missiles, or precision artillery munitions, such as the Paveway series of bombs, AGM-114 Hellfire, o ...

, from either an airborne or land based source, to "paint" a target.

Circular error probable In the military science of ballistics, circular error probable (CEP) (also circular error probability or circle of equal probability) is a measure of a weapon system's precision. It is defined as the radius of a circle, centered on the mean, wh ...

(CEP) 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 (e.g. tail fins), but impulse steering with mini-thrusters. It has been dubbed as the Russian concept of impulse corrections (RCIC). The concept has been demonstrated by Ametech (russian: Аметех - Автоматизация и механизация технологий) on 1999

MAKS airshow MAKS (russian: МАКС, russian: label=short for, Международный авиационно-космический салон, Mezhdunarodnyj aviatsionno-kosmicheskij salon, "International Aviation and Space Show") is an international air ...

, but it is not known if the system has been manufactured since, and in what numbers. The name Ugroza (sometimes transliterated ''Ugrosa''), have been first used for the company's semi-active laser-guided projectile (SAL-GP) for the 122 mm

BM-21 Grad The BM-21 "Grad" (russian: БМ-21 "Град", lit= hail) is a self-propelled 122 mm multiple rocket launcher designed in the Soviet Union. The system and the M-21OF rocket were first developed in the early 1960s, and saw their first com ...

series of

multiple rocket launcher A multiple rocket launcher (MRL) or multiple launch rocket system (MLRS) is a type of rocket artillery system that contains multiple launchers which are fixed to a single platform, and shoots its rocket ordnance in a fashion similar to a volle ...

s (it did not enter production and have been shelved as of 2010). Sources are not clear whether optical (TV) guidance can be used in place of laser guidance. The designation of rockets upgraded with Ugroza are given the suffix "''Kor''" (from Russian ''корректируемые'', meaning "correctable"): *S-5Kor *S-8Kor *S-13Kor

References

{{Reflist Air-to-surface missiles of Russia Air-to-ground rockets Weapons of Russia