Type 348 radar is a Chinese fire control radar developed for Type 76 twin 37 mm naval gun as CIWS, and it incorporates features of Italian RTN-10X and RTN-20X sold to China in 1992.
[2] The 800 round per minute maximum rate of fire of the larger twin 37 mm gun is not sufficient either, when compared to the Gatling gun of smaller calibers used by other CIWS at the time.
To increase the firepower, Type 348 radar is designed to control two twin 37 mm gun mounts simultaneously against the same target, thus doubling the volume of fire and increase the probability of kill.
Although the CIWS incorporating Type 348 radar and two twin 37 mm gun mounts has proved to be effective against subsonic sea-skimming anti-ship missile flying as low as just four meters above sea level, it nonetheless has been phased out of Chinese service when more advanced CIWS of Gatling design such as Type 730 CIWS became widely available.
[3] The shape of antenna is also an important visual cue to distinguish three radars.