Daegu-class frigate

The Daegu-class frigate (Hangul: 대구급 호위함, Hanja: 大邱級護衛艦) is a class of guided missile frigates of the Republic of Korea Navy (ROKN). The Daegu-class is based on the preceding Incheon-class frigate, and has otherwise been referred to an Incheon-class batch II, or FFG-II. Eight Daegu-class ships are planned, with the final goal of 20-22 frigates (of all types) in the ROKN.[1] The Daegu-class frigates are to be built by Daewoo Shipbuilding & Marine Engineering (DSME) and Hyundai Heavy Industries.

Class overview
NameDaegu class
Builders
Operators Republic of Korea Navy
Preceded by Incheon-class frigate
Succeeded byFFG-III
In commission2018–present
Planned8
Building3
Completed5
Active2
General characteristics
TypeGuided missile frigate
Displacement2,800 t (empty), 3,592t (full load)
Length122 m (400 ft)
Beam14 m (46 ft)
Draft4 m (13 ft)
Propulsion
Speed
  • 30 knots (56 km/h; 35 mph) (max)
  • 18 knots (33 km/h; 21 mph) (cruising)
Range4,500 nautical miles (8,000 km)
Complement140
Sensors and
processing systems
  • SPS-550K air search 3D radar
  • SPG-540K fire control radar
  • SQS-240K hull-mounted sonar
  • SQR-250K towed array sonar system
  • SAQ-540K EOTS
  • Hanwha Systems SAQ-600K IRSTs
  • Naval Shield Integrated Combat Management System
Electronic warfare
& decoys
  • LIG Nex1 SLQ-200(V)K Sonata electronic warfare suite
  • SLQ-261K torpedo acoustic counter measures
  • MASS decoy launchers
Armament
Aircraft carriedSuper Lynx or AW159 helicopter
Aviation facilitiesFlight deck and enclosed hangar for one medium-lift helicopter

Features
See also: Incheon-class frigate

The Daegu-class is an improved variant of the Incheon-class frigate. Modifications to the Incheon-class include a TB-250K towed array sonar system and a 16-cell Korean Vertical Launching System (K-VLS) that is able to deploy the K-SAAM, Hong Sang Eo anti-submarine missile, and Haeryong tactical land attack cruise missiles.[2]

The hull design is generally based on the one of the Incheon-class. However, as a part of weapon system modifications, the superstructure has been significantly changed. The hangar and a helicopter deck on stern has been enlarged to support the operation of a 10-ton helicopter.[3][4]

The Daegu-class is the first Korean warship to be equipped with a combined diesel-electric or gas (CODLOG) propulsion system. The propulsion system of the ROKN ships have a gas turbine direct drive and four high speed diesel generators driving two Leonardo DRS permanent magnet electric motors. The Rolls Royce MT30 turbine engine replaces the twin gas turbine layout of the Incheon-class frigates.[1]

The Daegu-class provides improved anti-submarine warfare capability than the predecessor Incheon-class frigate. The improved ASW capability provided by the Hanwha Systems SQS-250K towed array sonar and SQS-240K hull-mounted sonar. [5]

Ships in the class
Name Pennant number Builder Launched Commissioned Status
ROKS Daegu FFG-818 DSME 2 June 2016 6 March 2018 Active
ROKS Gyeongnam FFG-819 DSME[6] 21 June 2019[7] 4 Jan 2021 Active
ROKS Seoul FFG-821 Hyundai Heavy Industries 11 November 2019 Launched
ROKS Donghae FFG-822 Hyundai Heavy Industries 29 April 2020 Launched
ROKS Daejeon FFG-823 DSME 3 May 2021[8] Launched[5]
ROKS Pohang FFG-825 DSME 8 September 2021 Launched
ROKS Cheonan FFG-826 Hyundai Heavy Industries 9 November 2021[9] Launched
ROKS Chuncheon FFG-827 Hyundai Heavy Industries 22 March 2022 Launched

References
  1. "Rolls-Royce to supply MT30 Gas Turbines to next three Korean Daegu-class frigates". www.rolls-royce.com.
  2. ROK Navy Launches New Warship Capable of Hitting Targets Inside North Korea - Thediplomat.com, 9 June 2016
  3. "Koreas New Coastal Frigates: the FFX Incheon Class".
  4. South Korea Orders Two Daegu-class FFX-II Frigates Ahead of Schedule to Support Shipbuilder - Navyrecognition.com, 21 December 2016
  5. GDC (2021-07-12). "South Korea launches fifth FFX II Daegu-class frigate ROKS Daejeon". Global Defense Corp. Retrieved 2021-07-13.
  6. "방사청, 최신예 호위함 2번함 건조 계약 대우조선과 체결". 11 October 2016.
  7. "해군, 신형 호위함 '경남함' 진수식". 21 June 2019.
  8. "S. Korea launches new frigate with improved anti-submarine capabilities". Yonhap. 3 May 2021. Retrieved 3 May 2021.
  9. "Cheonan Reborn 11 Years After Torpedo Attack by N.Korea". The Chosun Ilbo. 10 November 2021.
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