Sea Zenith
Sea Zenith is a four-barrelled 25 mm CIWS It was developed in the 1980s by Oerlikon Contraves (Rheinmetall Air Defence since 2009) around their Oerlikon KBB gun and manufactured in Switzerland. Before 1989 it was known as the Sea Guard. This automatic gun uses a 25x184mm cartridge (longer than the one used by the more common Oerlikon KBA gun) at a rate of 800 rounds a minute.
Sea Zenith
- Field
- close-in weapon system
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Sea Zenith is a four-barrelled 25 mm CIWS It was developed in the 1980s by Oerlikon Contraves (Rheinmetall Air Defence since 2009) around their Oerlikon KBB gun and manufactured in Switzerland. Before 1989 it was known as the Sea Guard. This automatic gun uses a 25x184mm cartridge (longer than the one used by the more common Oerlikon KBA gun) at a rate of 800 rounds a minute.
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wikidata · Q2633003 · wikipedia · Sea Zenith
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Operations
Operations
Using four independent guns instead of one multi-barrelled rotary cannon improves reliability. The system is mounted in an enclosed automatic turret and directed by the Seaguard radar developed by Contraves. The turret is tilted back to allow a higher elevation to intercept diving missiles. The system's primary purpose is defence against anti-ship missiles, and other precision guided weapons. However it can also be employed against fixed/rotary wing aircraft, ships and other small craft, coastal targets, and floating mines. • Caliber: 25 mm • Barrels: 4 (independent) • Rate of fire: 3,200 rpm (combined) • Range: 2 km • Weight: 3500 kg
The Turkish Naval Forces installed Sea Zenith on their MEKO 200 frigates, like the Barbaros and Yavuz classes. New Turkish made Aselsan Gökdeniz CIWS took the role of the gun-based CIWS in new and modernized ships of the Turkish Naval Forces. It was also evaluated by the Italian Navy.
Gallery
Gallery
• Illustration — TCG Turgutreis bearing Sea Zenith • Illustration — Sea Zenith on Turgutreis • Illustration — Another view of Sea Zenith on Turgutreis
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These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Jane's Information Group. Oerlikon Contraves GM25 Sea Zenith (Switzerland). Jane's Naval Weapon Systems. March 18, 2009.
- 2.Valpolini, Paolo. Aselsan completed the world’s most comprehensive MEKO class frigate modernization. EDR Magazine. 2025-04-09.
- 3.Vavasseur, Xavier. Aselsan’s Gökdeniz CIWS integrated into first Istanbul-class frigate after completing FAT. Janes. Janes Information Services. 24 August 2023.
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Sea Zenith is connected to 1 other published record in the VALÉORINE Encyclopedia.
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
Elsewhere in Militaria
6,095 published records in this field, each with its sources named.
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