Launching an upgraded FM-90N "flying midge" ship-to-air missile: the engine has greater thrust, faster speed, longer range, better maneuverability, stronger interception and anti-jamming ability, and the search and tracking distance of the fire control system is increased to 25 and 20 kilometers; The maximum range 15km, increased by 25%, and the minimum range corresponds to 700m. The shooting height is increased to 6000 meters, and the maximum overload is 35g, which can intercept aircraft and missiles flying at high altitude earlier; The maximum speed of the missile is 900 meters per second, exceeding Mach 2.6.

As a result of the above improvement, the single-shot hit rate of the missile has increased to 80%. It should be emphasized that FM-90N missile has improved its ability to intercept ultra-low altitude targets, and its flying altitude is 15m. The new system adopts dual-band radar, improves TV tracking system and adds laser tracker. Its detection ability and anti-jamming ability far exceed the original "rattlesnake", which can provide effective air defense protection for naval surface ships at low altitude and ultra-low altitude.