sentences:  Instead of using QW-1 Vanguard MANPADs, the FL-3000N system uses the HHQ-10 (Red Flag 10) naval surface to air missile developed from TY-90 missile.The diameter of the missile is enlarged by a third, but the most important design difference is its guidance system.The FL-3000N missile uses a combined guidance system that incorporates both passive radio frequency (RF) guidance and imaging infrared (ImIR) guidance.