Credit
United States Navy, Lt. Ed Early · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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Measured figures
Mark 3 per complete round
Single sourceMark 3 weight including 1,000 rounds onboard, each weighing
Single sourceConfiguration
| Specification | Bofors 57 mm Naval Automatic Gun L/70 | Sea Zenith |
|---|---|---|
| Type | Naval artillery[source] | four- barrelled 25 mm CIWS[source] |
| Place of origin | Sweden[source] | — |
| In service | 1971–present[source] | — |
| Used by | See users[source] | — |
| Designer | Bofors Defence[source] |
Mark 3: 14,000 kg (31,000 lb ) (weight including 1,000 rounds onboard, each weighing 6.5 kg (14 lb) per complete round)[source]
Mass
Single source3500 kg[source]
Bore length
Single sourceWith flash hider
Single sourceWithout flash hider
Single sourceBore length: 3,990 mm (157.09 in) Without flash hider: 4,045 mm (159.25 in) With flash hider: 4,345 mm (171.06 in)[source]
Mark 1
Single sourceMark 2
Single sourceMark 3
Single sourceMark 1: 200 rounds/min Mark 2: 220 rounds/min Mark 3: 220 rounds/min[source]
HE round
Single source1,035 m/s (3,400 ft/s) (HE round)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
Oerlikon Contraves ( Rheinmetall Air Defence since 2009)[source] |
| Designed | Mark 1: 1970 Mark 2: 1981 Mark 3: 1995[source] | — |
|---|
| Manufacturer | Bofors Defence (1970–2000) United Defense (2000–2005) BAE Systems AB (2005 onwards)[source] | — |
|---|
| Produced | Mark 1: 1970 Mark 2: 1985 Mark 3: 2000[source] | — |
|---|
| Variants | See variants[source] | — |
|---|
| Shell | 57 × 438 mm R (m/70) 6.1 kg (13 lb ) complete round 2.4 kg (5.3 lb ) pre-fragmented shell[source] | — |
|---|
| Barrels | Single barrel (progressive RH parabolic twist, 24 grooves)[source] | — |
|---|
| Action | Electronic firing[source] | — |
|---|
| Elevation | Mark 1: −10°/+78° (40°/s) Mark 2: −10°/+75° (40°/s) Mark 3: −10°/+77° (44°/s)[source] | — |
|---|
| Traverse | Full 360°: Mark 1: 55°/s Mark 2: 55°/s Mark 3: 57°/s[source] | — |
|---|
| Feed system | Magazine : Mark 1: 40 ready rounds, 128 rounds in ready racks in mount Mark 2: 120 ready rounds, up to 40 rounds in dual hoists Mark 3: 120 ready rounds, up to 40 rounds in dual hoists, 1,000 rounds in mounting[source] | — |
|---|
| Sights | Gyro-stabilized in local control.[source] | — |
|---|
| Manufacturing country | — | Switzerland[source] |
|---|
| Cartridge | — | 25x184mm cartridge[source] |
|---|
| Control | — | The system is mounted in an enclosed automatic turret and directed by the Seaguard radar developed by Contraves[source] |
|---|
| Reported operators |
| — |
|---|