The SCUD is a mobile, Russian-made, short-range, tactical ballistic surface-to-surface guided missile. It is a single-stage missile using storable liquid propellants.
The introduction of this new powerful cross-country wheeled vehicle gave this missile system greater road mobility, reduced the number of support vehicles required, and still preserved a great choice in selecting off-road firing positions.
The same basic chassis also has been used for the transporter-erector-launcher for the SCALEBOARD surface-to-surface guided missile.
In the early 1980s, the SCUD-B was replaced by the SS-23 SPIDER, which has greatly improved range (500 km), increased accuracy, and reduced reaction and refire times.