Algerian frigate Rais Korfou
Rais Korfou (903) (, also transliterated Rais Korfo or Rais Korfu) is a Koni II-class frigate of the Algerian National Navy.

Design and description 
Rais Korfou is a Project 1159T frigate (NATO reporting name: Koni II). The frigate has a length of , beam of  and draught of . The frigate has a displacement of  standard and  at full load. The ship is powered by combined diesel and gas (CODAG) propulsion system, consisted of one SGW Nikolayev M8B gas turbine with  and two Russki B-68 diesel engines with  connected to three shafts. She has a top speed of  with gas turbine and  with diesels only, and range of  with cruising speed of . The ship has a complement of 130 personnel.

The ship is armed with two AK-726 twin-barrel 76 mm guns and two AK-230 twin-barrel 30 mm autocannons. For anti-submarine warfare, the frigate are equipped with a pair of RBU-6000  Smerch-2 12-barrel anti-submarine rocket launchers and two depth charge racks. The ship could also carry 22 naval mines. As built, Rais Korfou was equipped with one 4K33 Osa-M (SA-N-4 'Gecko') twin missile launcher with capacity of 20 missiles for anti-aircraft and limited anti-surface capability.

As built, the ship sensor suites includes 3P-60 UE weapons control, MR-302 Rubka ("Strut Curve") air/surface search radar, Don-2 navigation radar, "High Pole B" IFF, "Watch Dog" and "Quad Loop" Electronic Support Measures (ESM) systems, two optronic directors, and MG-322 hull-mounted sonar. Fire control for the weapons consisted of Fut-B ("Hawk Screech") radar for the 76 mm guns, MR-104 Rys ("Drum Tilt") radar for the 30 mm autocannons, and MPZ-301 ("Pop Group") radar for missile control. The vessel was also equipped with two PK-16 decoy-dispenser system which used chaff as a form of missile defense.

Modernization 
Rais Korfou underwent a modernization refit in Kronstadt from 1997 to November 2000. The refit included the replacement of MR-302 Rubka with Pozitiv-ME1.2 radar, the removal of 4K33 Osa-M missile launcher and Fut-B radar, fitting of two twin 533 mm torpedo launchers amidships and replacement of ESM and decoy systems with new NRJ-6A ESM system and two PJ-46 decoy launchers.

Construction and career 
The frigate was laid down on 7 July 1982 at the A.M. Gorky Shipyard in Zelenodolsk with yard number 254. Launched on 11 November 1983, the ship was temporarily commissioned with the Soviet Navy on 30 August 1984 as SKR-129 with hull number 844. 

The ship departed Soviet Union for Algeria in October 1984. She was commissioned into Algerian National Navy as Rais Korfou in Algiers on 3 January 1985.

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Koni-class frigates
1983 ships
Ships built in the Soviet Union
Frigates of the Algerian National Navy