Review: Gökdeniz 35mm naval short-range air defense system CIWS for Istanbul-class frigate

According to information released by the Turkish naval defense industry, the new generation of Istanbul-class frigate will be fitted with the Gökdeniz naval version of the Korkut self-propelled short-range air defense system that will be mounted on new Istanbul-class of Turkish Navy. a naval version of the Korkut short-range air defense system that was unveiled in May 2019 during the defense exhibition in Istanbul, Turkey.
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Russian Vyborg Shipyard laid the Purga ice class coastguard ship of project 23550 925 001 Gökdeniz naval version of the Korkut self-propelled air defense system that will be mounted on new Istanbul-class frigates of the Turkish Navy.(Picture source Screen Shot Defence Hub YouTube)

On January 23, 2021, Navy Recognition has announced the launching of the first Istanbul-class frigate built for the Turkish Navy. The new ship was developed under the MILGEM Turkish national warship program that includes the development of multipurpose corvettes and frigates that can be used for a wide range of missions, including reconnaissance, surveillance, early warning, anti-submarine warfare, surface-to-surface and surface-to-air warfare, and amphibious operations.

The Istanbul-class frigate will be armed with local-made weapon systems including 35 mm (1.4 in) Aselsan Gökdeniz dual barreled CIWS (Close-in Weapon System), two 25 mm (0.98 in) Aselsan STOP automatic cannons, 16 ATMACA Vertical launching system anti-ship cruise missile, 16-cell (total 64 missiles) MDAS Vertical Launching System able to fire the HISAR Surface-to-air missile.

The Gökdeniz is a short-range air defense system armed with a 35mm twin-cannon developed by the Turkish company Aselsan and able to fire Airburst Ammunition (ATOM). An airburst round is a type of tactical anti-personnel explosive ammunition, typically a shell or grenade, that detonates in midair, causing air burst effect fragment damage to an enemy. Each barrel has a rate of fire of 1,100 rounds per minute with a magazine of 100 rounds. The turret has a traverse of 360° and elevation from -15° to +85°. It has a maximum firin range of 4 km.

The new Close-In Weapon System was developed and designed based on the Korkut self-propelled air defense systems mounted on tracked armored chassis.

The Gökdeniz is designed to destroy current aerial threats including fighter, helicopter, UAVs (Unmanned Aerial Vehicles), as wells as subsonic and supersonic anti-ship missiles. The system with the Automatic Linkless Ammunition Feed Mechanism allows loading both HEI and Airburst Ammunition at the same time and switching between ammunition types as needed.

The Gökdeniz air defense system is fitted with an automatic target tracking with an integrated tracking platform including a tracking radar and electro-optics sensors. In option, the system can be fitted with a 3-D radar. The system can detect air targets at a range of up to 70 km.

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