Dosan Ahn Changho-class submarine

Last updated
Jangbogo- 1464856891.jpg
Model of a Dosan Ahn Changho-class submarine
Class overview
Builders
OperatorsFlag of South Korea.svg  Republic of Korea Navy
Preceded by Son Won-il class
CostUS$ 900,000,000
Built2016–present
In service2020 schedule
Planned9
Building2
Completed1
General characteristics
Type Attack submarine
Displacement(Batch I) 3,358  t (3,305 long tons) surfaced, 3,750 t (3,690 long tons) submerged
Length83.5 m (273 ft 11 in)
Beam9.6 m (31 ft 6 in)
Draught7.62 m (25 ft 0 in)
Propulsion
  • Diesel-electric, low noise skew back propeller
  • 4 x Bumhan Industry PH1 PEM fuel cell each with 150 kW [1]
Speed
  • 12 knots (22 km/h; 14 mph) surfaced
  • 20 knots (37 km/h; 23 mph) submerged
Range10,000  nmi (19,000 km; 12,000 mi)
Endurance50 days
Complement50
Armament
  • Batch-1
  • 6 x 533 mm (21 in) torpedo tubes (Tiger Shark torpedo and Harpoon missile)
  • 6 x VLS tubes (cruise and ballistic missiles)

The Dosan Ahn Changho-class submarines are the final phase of the Korean Attack Submarine program, a three-phased program to build 27 attack submarines for the Republic of Korea Navy between 1994 and 2029. [2] The lead vessel, Dosan Anh Changho , was launched in 2018. It began sea trials in 2019 and entered service on 13 August 2021. [3] [4]

Contents

Design and description

The new class will have a submarine version of the Korean Vertical Launching System which will be able to carry up to ten indigenous "Chonryong" land-attack cruise missiles and "Hyunmoo" submarine-launched ballistic missiles (SLBM), [2] becoming the first submarine in the South Korean navy to have this kind of capability. It will also have many other improvements compared to its predecessors built with a greater degree of South Korean technology, especially in the later batches, which will include Samsung SDI lithium-ion batteries. [5] [6] Measured to displace over 3,800 tonnes (3,700 long tons ) submerged during sea trials, [3] they are the largest conventional submarines ever built by South Korea. The Batch II vessels will increase their displacement by approximately 450 t (440 long tons) (4,250 t, 4,180 long tons submerged), according to the Defense Acquisition Program Administration. [7]

KSS-III Batch II

On 25 April 2016 there was a South Korean Congressional Hearing session held immediately after North Korea's SLBM launch, which raised some important questions about the ROK Navy's submarine capabilities to counter this threat. In response to questions whether the ROK Navy was currently developing capabilities to counter the SLBM threat, the ministry confirmed that the KSS-III Batch-II will undergo redesign process before construction (lasting until 30 December 2018) to accommodate capability upgrades. These upgrades will give the Batch-II submarines better capabilities at both attacking strategic land-based facilities and performing anti-submarine warfare. The Next Generation Submarine Project Team held a "System Functional Review" meeting on the KSS-III Batch-II submarine in late June 2017 which led to a review of the Batch-II design. [8]

Expected changes of Batch-II compared to Batch-I:

Construction and service

The lead vessel, Dosan Anh Changho, was launched in 2018. It began sea trials in 2019 and entered service in August 2021. [3] [4] The second vessel of first batch was observed nearing completion in the Geoje shipyard of Daewoo Shipbuilding & Marine Engineering on 12 May 2019. [9]

Exports

DSME has offered a 3,000 ton variant of the KSS-III, known as the DSME-3000 to the Indian Navy, under the latter's Project-75 (India) (P-75I) submarine procurement initiative. [10] The DSME-3000 is noted to be quite similar to the KSS-III, with a displacement of about 3,300 tons, with a length measuring 83.5 m and a beam measuring 9.7 m. [11] The DSME-3000 was first displayed to the public at the 2021 convention of the "International Maritime Defense Industry Exhibition" (MADEX). [12]

The DSME-3000 will be equipped with lithium-ion batteries and a fuel-cell powered air-independent propulsion (AIP) system, as on the KSS-III; however, the variant being offered to India lacks the K-VLS cells which are standard on both Batch-I and Batch-II submarines being built for the Republic of Korea Navy. [13]

DSME officially announced its participation in P-75I in April 2019; having being invited by the Indian Navy, and was shortlisted as a finalist in the competition, along with four other international shipyards - ThyssenKrupp Marine Systems (TKMS), Rubin Design Bureau, Navantia and Naval Group. [14] [15] As of September 2021, DSME is reported to be the only contender still competing in P-75I; the other four contenders withdrew from the program, on account of varying reasons. [16]

Ships in the class

NamePennant numberBuilderLaid DownLaunchedCommissionedStatus
ROKS Dosan Ahn Changho SS-083 DSME 17 May 201614 September 201813 August 2021Active
ROKS Ahn Mu SS-085DSME17 April 201810 November 2020Launched
ROKS Shin Chaeho SS-086 Hyundai Heavy Industries 11 April 201928 September 2021Launched
ROKS Lee Bong-chang SS-087DSME

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Korean Attack Submarine program Three-phased project to build up the Republic of Korea Navy attack submarine arsenal

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<i>Jang Bogo</i>-class submarine Submarine class

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KDDX-class destroyer

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ROKS <i>Sejong the Great</i> (DDG-991) Sejong the Great-class destroyer

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ROKS <i>Yulgok Yi I</i> (DDG-992)

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ROKS <i>Seoae Ryu Seong-ryong</i> (DDG-993) Sejong the Great-class destroyer

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ROKS <i>Dosan Ahn Changho</i> (SS-083) Dosan Ahn Changho-class submarine

ROKS Dosan Ahn Changho (SS-083) is the lead ship of Dosan Ahn Changho-class submarines. She is expected to be commissioned in 2020.

ROKS <i>Ahn Mu</i> Dosan Ahn Changho-class submarine

ROKS Ahn Mu (SS-085) is the second ship of Dosan Ahn Changho-class submarines of the Republic of Korea Navy.

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References

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  3. 1 2 3 "South Korea's first KSS-3 submarine begins sea trials". Jane's.com. Archived from the original on 2019-06-18. Retrieved 2019-07-08.
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  5. "South Korea approves procurement of next batch of Aegis destroyers, subs". Naval Today. 6 May 2019. Retrieved 24 November 2020.
  6. "DSME Jangbogo-III Batch-II Pilot Design Has Come to an End". Navy Recognition. 28 December 2018. Retrieved 24 November 2020.
  7. Jeong, Jeff (2 May 2019). "South Korea to build 3 more Aegis destroyers able to thwart ballistic missiles". Defense News. Retrieved 24 November 2020.
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  9. 도산 안창호급 2번함: Bemil, Chosun Ilbo
  10. https://www.navalnews.com/event-news/madex-2021/2021/06/madex-2021-dsme-sheds-light-on-submarine-offer-to-india-for-p-75i/
  11. https://www.theweek.in/news/sci-tech/2021/06/16/korean-shipbuilder-touts-advanced-batteries-for-submarines-on-offer-to-india.html
  12. https://www.navalnews.com/event-news/madex-2021/2021/06/madex-2021-dsme-sheds-light-on-submarine-offer-to-india-for-p-75i/
  13. https://www.navalnews.com/event-news/madex-2021/2021/06/madex-2021-dsme-sheds-light-on-submarine-offer-to-india-for-p-75i/
  14. https://www.defensenews.com/industry/2020/01/22/india-makes-initial-bid-selections-for-7-billion-submarine-project/
  15. https://www.financialexpress.com/defence/saab-out-south-korean-company-in-for-the-conventional-submarines-for-the-indian-navy/1719545/
  16. https://economictimes.indiatimes.com/news/defence/germany-may-not-bid-for-navys-p75i-submarine-project-leaves-south-korean-firm-as-only-vendor/articleshow/85447687.cms