GÖKDENİZ Deliveries & Inventory: Which Ships Use It, When Was It Delivered? (2026)

GÖKDENİZ is a close-in weapon system that rotates 360° around a warship, detects targets with radar and electro-optic sensors, and fires its 35 mm twin barrels at a high rate. Its job is to destroy, at the last moment, threats that pierce the other defensive layers before they reach the ship.

The system is derived from ASELSAN’s land-based KORKUT 35 mm air-defense system. This shared base allows common ammunition and technology across land and naval air defense, offering logistics and cost advantages.

GÖKDENİZ is positioned as the last-ditch weapon of the Turkish Navy’s new-generation ships. The table summarises the main platforms where it is integrated or planned.

Beyond domestic ships, it travels abroad with exported MILGEM corvettes and other platforms.

GÖKDENİZ was first unveiled at IDEF 2019. After development and qualification, its first Turkish Navy delivery was to TCG İstanbul, the lead Istif (Istanbul)-class frigate.

Following the factory acceptance test, a live-fire test on TCG İstanbul on 9 January 2026 succeeded — the clearest sign of GÖKDENİZ’s readiness for operational use.

GÖKDENİZ quickly drew international buyers. It was chosen for Pakistan’s new MILGEM corvettes, the close-in defense of a new Philippine warship, and Turkmenistan’s corvettes.

GÖKDENİZ performs the same role as the US 20 mm Phalanx CIWS, the Dutch Goalkeeper and Italy’s DARDO. Its 35 mm caliber and airburst ATOM ammunition create a wider effect cloud than smaller systems, raising hit probability against missiles and UAVs.

Being fully indigenous and sharing ammunition with the KORKUT land system gives Türkiye both supply independence and cost advantages — localizing one of the most critical links of modern naval air defense.

GÖKDENİZ’s greatest strength is its programmable ATOM airburst round, which splits into many sub-projectiles at the computed closest point to the target, achieving high kill probability even against small, fast threats.

A linkless dual feed lets the system load HEI and ATOM simultaneously and switch instantly by threat. The integrated fire-control radar and electro-optic suite can detect, track and engage targets autonomously.

GÖKDENİZ is built by ASELSAN, which developed the radar, fire control, electro-optics and ammunition components largely in-house for a high level of localization.

It carries ASELSAN’s KORKUT land-air-defense experience into the naval domain — a continuity that demonstrates the company’s systems-engineering capability in air defense.

GÖKDENİZ localizes the last line of defense of Turkish warships, removing a critical dependency. As anti-ship missile threats grow, an effective indigenous CIWS is strategically vital to a navy’s survivability.

Exporting it brings revenue and international visibility for Türkiye’s naval-defense ecosystem; offering it as a package with platforms like MILGEM strengthens competitiveness.

GÖKDENİZ is a 35 mm dual-barrel close-in weapon system (CIWS) developed by ASELSAN. It forms the last line of defense against anti-ship missiles, UAVs and precision-guided munitions targeting a ship.

Istif (Istanbul)-class frigates, Barbaros-class modernization and the TCG Derya support ship. For export it was selected for Pakistani, Philippine and Turkmen ships.

Unveiled at IDEF 2019, its first Turkish Navy delivery was to TCG İstanbul, the lead Istif-class frigate; a live-fire test was passed on board on 9 January 2026.

Phalanx is 20 mm, while GÖKDENİZ uses a 35 mm twin barrel with airburst ATOM ammunition for a wider effective zone against missiles and UAVs — and it is fully indigenous.

ATOM is ASELSAN’s programmable 35 mm airburst round that splits into many sub-projectiles near the target, raising hit probability against small, fast threats like missiles and UAVs.

Yes — it was chosen for Pakistan’s new MILGEM corvettes, a new Philippine warship and Turkmen corvettes, making it one of Türkiye’s exported naval weapon systems.