AK - 630 The AK - 630 is a Soviet and Russia n fully automatic naval close - in weapon system based on a six - barreled 30 mm rotary cannon . In " 630 " , " 6 " means 6 barrels and " 30 " means 30 mm . It is mounted in an enclosed automatic turret and directed by radar and television detection and tracking . The system ' s primary purpose is defense against anti - ship missile s and other precision guided weapons . However it can also be employed against fixed or rotary wing aircraft , ships and other small craft , coastal targets , and floating mines . The AK - 630 was one of the first ever CIWS systems : when it was developed , there were no Phalanx , DARDO or Goalkeeper systems ; however , the long development time of the AK - 630 partially negated this advantage . Once operational , this weapon system was rapidly adopted , with up to 8 units installed in every new Soviet warship ( from mine - hunters to aircraft carriers ) , and hundreds produced in total . Description . The complete weapon system is called A - 213 - Vympel - A , which comprises the AK - 630M Gun Mount , MR - 123 - 02 Fire Control Radar System , and SP - 521 Electrical - Optical Tracker . A single MP - 123 radar system can simultaneously control two guns , either two 30 mm gun mounts , or two 57 mm gun mounts , or one 30 mm gun and one 57 mm gun . The radar system can engage aerial and surface targets at 4 km and 5 km respectively . The electro - optical system can detect a MiG - 21 sized aerial target 7 km away while torpedo boat sized surface targets can be detected at a range of up to 70 km . Features include surveillance and tracking modes , high jamming immunity , laser range finder and TV optical sight . It is in operation on almost all Russian Navy ships from fast attack boats to the Kirov Battlecruiser . The gun mount is fully automated , and can also be remotely controlled by an operator from either the control console or via a remotely - mounted gunsight . It has a higher firing rate than both the Goalkeeper and Phalanx ( Block 1 and older ) CIWS systems . They are often mounted in pairs , with as many as four pairs mounted on the larger ships , providing an effective point defence system . However , like all gun - based CIWS , they suffer from short engagement times and the need for multiple volleys to effectively eradicate a threat . Development . The AK - 630 CIWS is composed of several members and sometimes the CADS - N - 1 Kashtan system and its derivative are also included . AK - 630 . The design of the AK - 630 CIWS was initiated in 1963 , with the first operational prototype completed in 1964 . Trials of the complete system , including radar and controls went on until 1976 when the system was accepted for service . AK - 630M . During the deployment of the system , numerous problems that did not appear in trials were exposed in its application , and some modification of the original AK - 630 was made to correct these problems , and in 1979 , the new system was named as AK - 630M and was accepted into service . AK - 306 . A derivatives of AK - 630M was developed for light craft and this system was named as AK - 306 . Externally , the air - cooled AK - 306 can be distinguished from the AK - 630 by the absence of the water cooling system ( a cylindrical jacket that surrounds the barrel cluster of the AK - 630 ) . Internally , the AK - 306 ( A - 219 ) used electricity to power the automatics , instead of using the exhaust . This version also lacked radar control , being only optically guided , hence making it less of an anti - missile weapon and more of a surface - to - surface weapon , and the designation of the overall system is consequently changed from A - 213 - Vympel - A to A - 219 . The design started in 1974 and the system was accepted into service in 1980 . When production was completed in 1986 , 125 systems were in service . AK - 630M1 - 2 . In 1983 , a decision was made to update the design and modify the AK - 630 system to include a second gun mounted above the first , which provides 10 , 000 rpm in total . The AK - 630M1 - 2 " Roy " was roughly the same size and weight allowing installation in existing AK - 630 mounts . Though the system proved to be successful , the AK - 630M1 - 2 Roy was not accepted for production due to the maturity of a combined missile and gun system , then designated the 3M87 Kortik , but later called Kashtan . The single example of AK - 630M1 - 2 Roy remains installed on the Project 206 . 6 class missile boat # P - 44 . In July 2007 at IMDS - 2007 , a modernized version of the AK - 630M1 - 2 was showcased by OAO AK Tulamashzavod under the new name " Duet " . Visually " Duet " differs from " Roy " in having a new mount with a stealthy low RCS design compared with the more traditional rounded AK - 630 mounts . In 2012 it was announced that the new Ivan Gren - class landing ship would be armed with the modified AK - 630M - 2 system .