This weapon is based upon the German Mauser MK 30 mm Model F gun and uses standard NATO ammunition. Effectively, this weapon is a scaled-down version of OTO-Breda's 40 mm/70 mounting. These mountings for these weapons are unmanned, gyro-stabilized and joystick controlled. The optical sighting system is line-of-sight stabilized with the aim-off automatically calculated while the target is kept in sight. OTO-Breda (now OTO-Melara) claimed that this system is effective against surface targets at ranges up to 3,000 meters (3,300 yards).
OTO-Melara currently offers these weapons in either single or twin above deck mountings with local or remote control or in Compact-style mountings with below-deck magazine. These mountings are also shared with the 25 mm Compact.
Sea Cobra was a joint design between Marconi and OTO-Breda. This weapon was first tested in Britain at the Fraser Gunnery Range in the summer of 1988. The first operational installations were for the Italian Customs Service.
|Designation||Gun: 30 mm/82 (1.2") Mauser MK 30-1 Model F|
|Ship Class Used On||Coastal Patrol Boats|
|Date Of Design||1984|
|Date In Service||1988|
|Gun Weight||340 lbs. (154 kg)
Barrel only: 132 lbs. (60 kg)
|Gun Length oa||131.9 in (335 cm)|
|Bore Length||about 97 in (246 cm)|
|Rate Of Fire||up to 800 rounds per minute per gun|
|Weight of Complete Round||HEI PGU-13: 1.50 lbs. (0.681 kg)
API PGU-14: 1.53 lbs. (0.694 kg)
|Projectile Types and Weights||HEI PGU-13: 0.83 lbs. (0.378 kg)
API PGU-14: 0.60 lbs. (0.272 kg)
|Propellant Charge||0.33 lbs. (0.150 kg)|
|Cartridge||30 x 173 mm|
|Muzzle Velocity||HE: 3,410 fps (1,040 mps)
APDS: 4,000 fps (1,220 mps)
|Working Pressure||324.2 tons/in2 (3,800 kg/cm2)|
|Approximate Barrel Life||5,000 rounds|
|Ammunition stowage per gun||
|Distance||Time of Flight|
|3,300 yards (3,000 m)||5.36 seconds|
(see Notes 1 and 2)
|Single 30 mm Compact Naval Mount 1: Mod 559 , Mod 564, Mod 563
Twin 30 mm Compact Naval Mount 2: Type A, Type B
Twin Sea Cobra
|Elevation||Single Mountings: -15 / +75 degrees
Types A and B: -13 / +85 degrees
Sea Cobra: -15 / +85 degrees
|Elevation Rate||Single Mountings: 80 degrees per second
Types A and B: 75 degrees per second
Sea Cobra: N/A
|Train Rate||Single: 140 degrees per second
Types A and B: 130 degrees per second
Sea Cobra: N/A
- ^Mod 559 is intended to be controlled only by an external FCS and/or by an emergency external aiming device (such as an Optical Director). Mod 564 has the external FCS supplemented by an electro-optic TV Micro Fire Control System (MFCS) which acts as a redundant system if the main FCS fails. The MFCS has an off-mount console equipped with a TV monitor and target indicators which can be remotely controlled from the ship's bridge. Mod 563 adds a manned on-mount control position with the operator utilizing the MFCS. This model is also available with a two axis stabilization of the line of fire.
- ^The difference between the Type A and Type B is simply in the number of ready-rounds on-mount. The Type A carries 2,000 rounds while the Type B carries 1,000 rounds.