variants of Type 052D destroyers and Type 054A frigates, and Type 051B destroyers (after 2011 refit). LD-2000 has been deployed by People's Liberation Army Ground Force and Marines for local air defense mission. Variants Type 730 Original variant. Type 730B Re-engineered Type 730 system to utilize off-mount target tracking sensor. The system integrates the 30 mm mounting with a network of off-mount tracking and surveillance sensors consisting of surveillance radar, fire-control radar and electro-optical sensor system. Type 730C Type 730C is a new variant unveiled in February 2017 that combines the existing Type 730 seven-barrelled 30 mm rotary cannon with 6x FL-3000N missiles. The system comes with LR66 tracking radar and OC8 electro-optical tracker, though not fitted on the CIWS probably due to weight and electromagnetic interference issues, to track two separate targets simultaneously (fire on one, keep track of the other); the whole system comes with the SR64A search radar. The gun carries two 500-round drums (total 1000 rounds) with firing modes of 1,000, 2,000, or 4,000 rounds per minute. Gun effective range: 150 m minimum, 1400 m interception, 2500 m effective against missiles (using APDS) 150–3500 meters against aircraft (using HE) 5000 meters against surface targets (using HE) Missile engagement envelope: 2–8 km LD-2000 The LD-2000 (LD: Lu Dun, 陆盾, meaning Land Shield) SPAAGM is a Chinese developed land-based close-in weapon system with counter rocket, artillery, and mortar (C-RAM) capability. LD-2000 is based on the Chinese Navy's Type 730. Part of the HQ-6A system, it pairs with HQ-64 missiles and a Counter Battery Radar. The radar is supplemented by a thermal imaging sight. The weapon is loaded with 1,000 rounds, enough, apparently, for about 48 potential target engagements, same as its naval counterpart, with effective range of 2.5 to 3.5 km. LD-2000 and HQ-6A system is deployed by People's Liberation Army since 2011. Type 1130 Further development of Type 730 resulted in the Type 1130, which first appeared on Chinese aircraft carrier Liaoning. This successor of Type 730 is also 30 mm caliber and has a total 11 barrels, with reported rate of fire of 11,000 rounds per minute. Originally developed with 10 barrels, later productions included 11 barrels when completed. Although it is reported that FL-3000 missiles can be integrated to the gun like FCS, this has not occurred yet, and FL-3000 was installed separately on the first Chinese aircraft carrier in its own launchers. There are