SY400 is a short-range precision-attack ballistic missile system. It was revealed in 2008. It might use technology of the Raytheon RGM-165 or SM-4. This weapon system is intended for the export market. It is proposed as an alternative to the Russian Iskander-E. China is calling it as a guided artillery rocket system, hence it is not limited by 300 km range export restrictions set by Missile Technology Control Regime.
SY400 is a further development of SY300, that can carry either two short-range ballistic missiles BP-12A with range of 400km or twelve 400mm rockets. As a low cost alternative to more expensive ballistic missiles, the accuracy of SY400 is increased by adding GPS to correct the cascade inertial navigational guidance, and according to the developer, the accuracy can be further improved if military grade GPS signals are used to replacing the existing civilian GPS signal. Another feature of SY-400 is that it shares the same launching vehicle and fire control system of BP-12A ballistic missile, thus simplifying logistics.
SY-400 system in standard configuration has eight containers with solid fuel missiles. Missiles are factory-fitted into these containers and can be stored for years and do not require additional maintenance. Missiles are launched vertically and can use different types of warheads.
SY400 is likely to use its high speed and precision guidance to attack high value targets of opportunities like grounded enemy aircraft, air defense sites and command centers, as well as fixed installations such as ammunition depots and bunkers.
SY400 projectile is a 400mm diameter solid-fuel rocket that weighs about two tons with two warhead options. With a 300 kg (660 pound) warhead, range is 150 kilometers. With a 200 kg (440 pound) warhead, range is 200 kilometers.
SY400 system can be configured to carry 2 pods with heavier BP-12A missiles. The BP-12A missile has a range of 280 km and carries a 480 kg warhead. The BP-12A was specially designed to be just short of the 300 km range.
SY400 system has 8 containers with solid fuel ballistic missiles. Missiles are factory-fitted into these containers and can be stored for years and do not require additional maintenance.
This weapon system is mounted on Wanshan 8x8 high-mobility wheeled launcher. The launcher vehicle has good cross-country mobility and can go over all kinds of rough terrain.
It was reported that Qatar became the first user of SY-400 ballistic missiles, as in 2017, Qatar showed SY-400 ballistic missiles. However, Qatar chose BP12A tactical ballistic missiles instead of “guided rockets”. Qatar, the first customer for the SY400, was the latest Arabian nation to obtain ballistic missiles
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