The Type 345 (MR35) fire-control radar system is used to guide the HQ-7 short-range surface-to-air missile.

The system is installed on many modern and retrofitted Chinese navy ships.

[1] The Type 345 fire control radar appears to be based on the Thomson-CSF Castor CTM (Conduite de Tir Multisensor) fire control radar, which is a Castor II/J with a separate IR camera (Piraña) and TV tracker and not the oft quoted Castor IIC.

It uses a TWT transmitter with a Cassegrain antenna.

Pulse compression (7.5 μs pulse) and pulse Doppler processing (first blind speed 1000 m/s) techniques are used, and it can acquire ASHM at 18 km and fighter at 30 km with a tracking range between 350 m and 30 km.