Credit
United States Navy, Lt. Ed Early · Public domain · Resized · Public domain · Source ↗ · Modified
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BNaval guns
close-in weapon system designed by Rheinmetall Air Defence AG for mounting on ships
Measured figures
Configuration
| Specification | Bofors 57 mm Naval Automatic Gun L/70 | Rheinmetall Sea Snake 30 mm |
|---|---|---|
| Crew | — | unmanned[source] |
| Type | Naval artillery[source] | CIWS[source] |
| Place of origin | Sweden[source] | Switzerland[source] |
| In service | 1971–present[source] | 2025 |
Width
Single source1.91 m[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]
Single shot Burst (automatic fire)
Single sourceSingle shot Burst (automatic fire): 1,100 rounds per minute[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Used by | See users[source] | Brazilian Navy Swedish Amphibious Corps[source] |
|---|
| Designer | Bofors Defence[source] | — |
|---|
| Designed | Mark 1: 1970 Mark 2: 1981 Mark 3: 1995[source] | 2021[source] |
|---|
| Manufacturer | Bofors Defence (1970–2000) United Defense (2000–2005) BAE Systems AB (2005 onwards)[source] | Rheinmetall Air Defence[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] | 30×173mm[source] |
|---|
| Barrels | Single barrel (progressive RH parabolic twist, 24 grooves)[source] | Singular[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] | -25 / +60 degrees rate: 90 degree/s[source] |
|---|
| Traverse | Full 360°: Mark 1: 55°/s Mark 2: 55°/s Mark 3: 57°/s[source] | 360 degrees rate: 120 degrees per second[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] | — |
|---|
| Role | — | close-in weapon system designed by Rheinmetall Air Defence AG for mounting on ships[source]Exact source equipment subject, not its payload or a supported platform |
|---|
| Reported operators |
| — |
|---|