Istanbul-class frigate

	TCG Istanbul (F-515) at the Bosporus strait, during the naval parade for celebrating the centennial of the Turkish Republic, 29 October 2023.
Class overview
Name	Istanbul class
Builders	Istanbul Naval Shipyard
Operators	Turkish Naval Forces; Indonesian Navy (future);
Preceded by	Barbaros class
Cost	$500 million per unit
Built	2017–present
In commission	2024–present
Planned	10
Building	5
Completed	3
Active	1
General characteristics
Type	Multirole frigate
Displacement	3,100 tonnes
Length	113.2 m (371 ft 5 in)
Beam	14.40 m (47 ft 3 in)
Draft	4.05 m (13 ft 3 in)
Installed power	4 x 560kw Generator
Propulsion	1 x GE LM2500 Gas turbine; 2 x 5.766HP MTU Diesel Machine; 2 x Controllable Pitch Propeller (CPP);
Speed	Economy: 14 kn (26 km/h; 16 mph); Maximum: >29 kn (54 km/h; 33 mph);
Range	5,700 nmi (10,600 km; 6,600 mi) at 14 kn (26 km/h; 16 mph)
Boats & landing; craft carried	2 x RHIB
Complement	123
Sensors &; processing systems	Radars: Aselsan Cenk-400N 4D Gallium Nitride (GaN)-based AESA search radar with 1000 targets tracking capacity and 400 km range, Aselsan ALPER-200N LPI Surface Radar, Aslesan AKREP-300N (AKR-D Block B-1/2) Fire Control Radar; Other systems: Aselsan SeaEye-AHTAPOT Electro-optical reconnaissance, surveillance and targeting system, Aselsan PIRI-100 IRST, Aselsan TAKS-100/76GFCS main gun fire control system, ATMACA 100/AFCS anti-ship missile fire control system, HİSAR 100N/FCS air defence missile fire control system, Aselsan KULAÇ Sounder system, DEMES meteorological measurement system, AHTAPOT-100 Electro-optical director, ANS 510-M gyro system, LIAS 200-N Advanced Laser Warning Receiver System, Infrared Trace Management System, ; Sonar: Aselsan FERSAH 100N/MF hull mounted sonar; Communications: SATCOM, Link 11/16, Link 22 Local Area Network, Internal Communication System, Underwater phone; Combat Systems: Havelsan ADVENT Combat Management system, GEMS Integrated combat system, IdentIFF M5 TPX & I/LR IFF system, AcroSAT Ku-120-M Satellite combat system, AcroSAT Ku-150-M Satellite combat system;
Electronic warfare; & decoys	ESM: ASELSAN ARES 2N/NGE; ECM: Aslesan AREAS 2NC/E; ARES-NEWS Central management system; Decoy: Aselsan HIZIR Torpedo countermeasures system; Aselsan KARTACA-N Decoy ejection system;
Armament	Guns:; 1 × MKE 76 mm/62-caliber gun or OTO Melara 76 mm Super Rapid (only on TCG Istanbul) main gun; 1 × Aselsan GOKDENIZ 35 mm dual barreled CIWS; 2 × Aselsan STOP 25 mm RCWS; Anti-ship missiles:; 4 × 4 (total 16) Atmaca anti-ship missiles; Vertical launching system:; 16-cell MiDLAS vertical launching system:; up to 16 SAPAN or SIPER Block 1 Surface-to-air missiles or up to 64 smaller Hisar-D surface to air missiles ; Torpedoes:; ZIPKIN 100/D Torpedo tube system; 2 × 324 mm (13 in) Double Torpedo launchers with Roketsan Orka or MK-46M5 Torpedoes;
Aircraft carried	Hangar and platform for:; S-70B Seahawk ASW helicopter; Unmanned aerial vehicles (UAV);

The Istanbul-class frigates (also known as TF-100, MILGEM II, İstif and I class) are a group of ten multirole frigates currently being constructed for the Turkish Naval Forces and the Indonesian Navy. Developed under the MILGEM national warship program as the I-class frigate, the Istanbul class is an enlarged version of the Ada-class anti-submarine corvette, with enhanced endurance and MiDLAS vertical launching system (VLS) for multi-role capability.

On 19 January 2017, the Turkish Navy held a ceremonial steel cut for the lead ship TCG Istanbul (F 515). Istanbul was laid down on 3 July 2017 and launched on 23 January 2021.