This mounting was originally developed by Emerson Electric as the EX-74 and was intended to arm the US CPIC coastal patrol boats, of which only a single prototype was ever built. The CPIC boat used a GFCS Mark 93 which incorporated the Kollmorgen Mark 35 periscope director.
With the cancellation of the US CPIC program, Emerson then further developed this weapon into an export version and has successfully sold them around the world.
This weapon system uses the Oerlikon 30 mm/75 KCB cannon which is also used on the British GCM and LS-30B weapon systems.
|Designation||Oerlikon: 30 mm/75 KCB
USN: 30 mm/75 Mark 28
|Ship Class Used On||USN: CPIC Coastal Patrol Boat
Exported to Ecuador, Ethiopia, Greece, Malaysia, Nigeria, Philippines, South Korea and Taiwan
|Date Of Design||Gun: 1968
|Date In Service||N/A|
|Gun Length oa||N/A|
|Bore Length||about 88.6 in (2.250 m)|
|Rate Of Fire||Cyclic: 600 rounds per minute|
|Weight of Complete Round||N/A|
|Projectile Types and Weights||HE: 0.93 lbs. (0.420 kg)
APDS: 0.66 lbs. (0.300 kg)
|Muzzle Velocity||HE: 3,543 fps (1,080 mps)
APDS: 3,854 fps (1,175 mps)
|Approximate Barrel Life||about 5,000 rounds|
|Ammunition stowage per gun
|Weight||Without ammunition: 4,156 lbs.
With ammunition: 8,263 lbs. above deck, 650 lbs. below
|Elevation||-15 / +80 degrees|
|Elevation Rate||80 to 85 degrees per second|
|Train Rate||90 degrees per second|
The original USN version differed from the export version in that it did not penetrate the deck while the export version has below-deck magazines.
The cab in the export version is climate controlled.