Type 730 CIWS


The Type 730 is a Chinese seven-barrelled 30 mm Gatling gun CIWS. It has a PLA Navy designation H/PJ12. It is mounted in an enclosed automatic turret and directed by radar, and electro-optical tracking systems. The maximum rate of fire is 5800 rd/m, and the effective range is up to 3 km.

Development

The gun is designed by the 713th research institute under the name 'Project 850' and is powered by two electric motors. The radar TR47C is a derivative of the EFR-1/LR66 J-band radar by Xi'an Research Institute of Navigation Technology, but it is unclear that if this derivative is developed by the same institution. The OFC -3/H/ZGJ-4 electro-optical fire control system is designed by the Central China Optronic Research Institute.

Origin

The system's primary purpose is defense against anti-ship missiles, and other precision guided weapons. However, it can also be employed against fixed/rotary wing aircraft, ships and other small craft, coastal targets, and floating mines. Though externally similar to the Dutch Goalkeeper in appearance, it is thought to operate indigenous radar and optical systems. Another reported source of technology was reported to be the French which had experimented with the same General Electric EX-83 mount for their CIWS requirements. Two systems, SAGEM's SAMOS and the Thomson-CSF's SATAN were under evaluation in October 1987. The SAGEM SAMOS system featured the EX-83 mount with a SAGEM VOLCAN optical director, while the Thomson-CSF variant was controlled with an off-board Castor IIJ fire-control radar. Photos of the prototype Type 730 unit under trial apparently shows a SAGEM VOLCAN EO director in place of the domestic OFC-3/H/ZGJ-4 EO director.

Design

Radar

The TR47C radar operates in the same way of AN/APY-1/2 radar on board E-3 Sentry in that the azimuth is scanned mechanically, while the elevation is scanned electronically, incorporating a total of 169 transceivers of phased array technology that enables the radar to pick up the splashes of 30 mm rounds. Like the western CIWS, the information is processed on site, via local computers of the radar and the gun mount, thus providing faster reaction time than the Russian design in which the radar and fire control system are separately located.
The system can track a sea-skimming target with 0.1 square metre radar cross section at 8 km, extended to 15 km if the radar cross section is increased to 2 square metres, and further extended to 20 km if the radar cross section is increased to 10 square metres, though the targets could not be engaged until much closer due to the limited range of the gun.

Fire-control system

The OFC-3 system is modular design that comprises a laser range finder, a color TV camera, and an IR camera, and the laser range finder can be replaced by a laser designator, the TV camera can be replaced by a night vision camera, and the IR camera can be replaced by an ImIR, at higher cost. Development to incorporate the dual band IR, night vision camera, and the color TV camera is reportedly in progress.
Type 730 CIWS is an autonomous closed-loop system and thus offers faster reaction time than the Russian AK-630. Type 730 CIWS is fully compatible with Chinese and European combat data systems such as ZKJ-1, ZKJ-4, ZKJ-4A-3, ZKJ-5, ZKJ-6, ZKJ-7, H/ZBJ-1, and Thomson-CSF TAVITAC, and can be directly integrated with these combat data systems without any modification.

Armament

The 30 mm Gatling gun mount designated as H/PJ-12 is extremely similar to the General Electric GAU-8/A Avenger. Although there are sources claiming that it is the Chinese version of the Russian Gryazev-Shipunov GSh-6-30 Gatling gun, this appears to be unlikely, since the Russian Gatling gun only has six barrels. H/PJ-12 is versatile in that its FCS can be either separately installed at different locations like the Soviet AK-630, or directly integrated on the gun mount. Like the American GAU-8/A Avenger, it is recommended not to fire longer than a single minute at a rate of 4,200 rounds per minute, after which the generated heat would begin melting the rifling of the barrels, shortening its useful life. Rates of fire beyond 4,200 rounds per minute increase wear. There are one or two ammunition drums each contains 640 or 500 rounds, and other versions of the ammunition drums have been reportedly developed.

Variants

Type 730

Original variant.

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 ; the whole system comes with the SR64A search radar. The gun carries two 500-round drums with firing modes of 1,000, 2,000, or 4,000 rounds per minute.
Gun effective range:
Missile engagement envelope: 2–8 km

LD-2000

The Chinese Navy is currently developing a new version of the system which will include missiles on the same installation. A land based variant designated LD-2000 have also been successfully developed, but this land version lacks the electro-optic fire control system of the ship-borne version, instead, 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. However, the missile armed version was first successfully developed for the land based version as LD-2000 Gai, with six surface-to-air missiles, three on each side of the turret, as it was revealed to public in 2005, but it is not clear the exact type of the missile, some claim that they are TY-90, while others claim they are DK-9, the surface-to-air version of PL-9.

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 two ammunition drums each contains 640 rounds.
Designated either H/PJ-11, the weapon is considered China's third generation CIWS, after the first generation Russian AK-630 and second generation indigenous Type 730. Chinese TV reported that it is able to intercept incoming anti-ship missiles up to a speed of Mach 4 with a 96% success rate.

Deployment

The system has been fitted on board the Type 052, Type 052B, Type 052C, Type 052D, Type 051C destroyers, F-22P and Type 054A frigates so far, and may replace some Type 76 mounts on older combatants.
Type 1130 has been deployed on Chinese aircraft carrier Liaoning, Chinese aircraft carrier Shandong, Type 055 destroyer, Type 075 landing helicopter dock, later variants of Type 052D destroyers and Type 054A frigates, and Type 051B destroyer.
LD-2000 has been deployed by People's Liberation Army Ground Force and Marines for local air defense mission.

Operators