The gun itself is an Oerlikon KBA which is belt fed with dual feed.
This weapon is also available in either a single, above deck mounting with local or remote control or in a Compact-style mounting with a below-deck magazine. These mountings are also shared with the 30 mm version.
25 mm in Compact Mounting
25 mm in Locally-controlled Mounting
25 mm in Power Assisted Mounting
Sketch of Power Assisted Mounting
25 mm KBA Gun
|Designation||25 mm/80 (1") KBA Oerlikon|
|Ship Class Used On||Coastal Patrol Boats|
|Date Of Design||about 1987|
|Date In Service||1990|
|Gun Length oa||N/A|
|Bore Length||about 79 in (200 cm)|
|Rate Of Fire||570 +/-50 rounds per minute cyclic|
|Weight of Complete Round||N/A|
|Projectile Types and Weights||HEI-T: about 0.34 lbs. (0.16 kg)
APDST: about 0.34 lbs. (0.16 kg)
|Cartridge||25 x 137 mm|
|Muzzle Velocity||HEI-T: 3,609 fps (1,100 mps)
APDST: 4,380 fps (1,335 mps)
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||Power Assisted Mounting: up to 252
rounds of ready ammunition
|Elevation||With 0.34 lbs. (0.16 kg) HEI-T Shell|
|Effective Range||2,200 yards (2,000 m)|
|Designation||25 mm Power Assisted (PA)
25 mm Compact Single or Twin
|Weight||Power Assisted - empty: 2,050 lbs.
|Elevation||Power Assisted: -15 / +50 degrees
Compact: -13 / +80 degrees
|Elevation Rate||Power Assisted: N/A
Compact: 75 degrees per second
|Train Rate||Power Assisted: N/A
Compact: 130 degrees per second
1) The Power Assisted mounting was originally designed for two 80-round ammunition boxes. Later, 96-round boxes were designed and now a newer version can carry two 126-round boxes. A box with 96 rounds weighs 132.3 lbs. (60 kg). This mounting uses a 24 Vdc lead-acid battery which is recharged from the ship's power supply.
2) The twin Compact version uses a specially designed OTOBreda cradle. This can carry 2,000 rounds (Type A version), 1,000 rounds (Type B version) or 500 rounds (Type C version). The differences are mainly in the depth of the below-deck magazine.
17 April 2008 - Benchmark
26 May 2012 - Updated to latest template