Asahi-class destroyer

Last updated
DD-120 Shiranui 01.jpg
JS Shiranui (DD-120)
Class overview
Builders Mitsubishi Heavy Industries
OperatorsNaval Ensign of Japan.svg  Japan Maritime Self-Defense Force
Preceded by Akizuki class
Cost
  • DD119: JPY72.3 billion [1]
  • $893 million (constant 2009 USD)
Built2015–2019
In service2018-present
In commission2018–present
Completed2 [2]
Active2
General characteristics
Type Destroyer
Displacement
  • 5,100  t (5,000 long tons) standard
  • 6,800 t (6,700 long tons) full load
Length151 m (495 ft 5 in)
Beam18.3 m (60 ft 0 in)
Draft5.4 m (17 ft 9 in)
Depth10.9 m (35 ft 9 in)
Propulsion COGLAG, two shafts, two GE LM2500 turbines
Speed30 knots (56 km/h; 35 mph)
Complement230
Sensors and
processing systems
Armament
Aircraft carried1 × SH-60K helicopter

The Asahi class of destroyers of the Japan Maritime Self-Defense Force is optimized for undersea warfare. The class was initially designated "25DD", referring to a date on the Japanese calendar, specifically the 25th fiscal year of the Heisei period (2013).

Contents

The lead ship, Asahi, is the third ship to hold the name after the Asahi-class destroyer escort lent from the United States Navy in 1955, and the Imperial Japanese battleship. The second ship of the class, Shiranui, is the third ship to hold the name after the Murakumo and Kagerō-class destroyers.

Development

The procurement of the destroyer began in 2013 in response to the reduction in the number of destroyers (namely the Hatsuyuki class) within the JMSDF. The two major characteristics of this destroyer is its bigger emphasis on anti-submarine warfare and the adoption of the COGLAG (combined gas turbine electric and gas turbine: a modification of the combined gas and gas propulsion system employing electric propulsion system for low-speed cruising) propulsion system. A second destroyer was procured a year later. [3] [4]

Design

The Asahi class is based on the existing Akizuki-class destroyer to reduce acquisition cost and allow future development and growth. Unlike the Akizuki class (which focuses on anti-aircraft warfare) the Asahi class focuses on anti-submarine warfare. [5]

Features

The Asahi class is the first Japanese warship to be equipped with a COGLAG propulsion system. This allows the destroyer to be more fuel efficient than previous warships. Another unique feature about this destroyer is the usage of a GaN-AESA (gallium nitride - active electronically scanned array) Multifunction Radar. The Asahi class is the second Japanese class of warship to be outfitted with this technology (the Akizuki class was the first). The destroyer's radar is based on the FCS-3A radar used for the Akizuki class and uses gallium nitride to improve performance. [5] In radar technology, gallium nitride offers a number of advantages over the traditionally used gallium arsenide (GaA). These advantages include higher power density, efficiency, thermal spreading and frequency coverage. This in turn allows the GaN chip to be smaller than their GaA counterpart, thus reducing cost and increasing overall cost effectiveness. [6]

Ships in the class

Building no.Pennant no.Name/NamesakeLaid downLaunchedCommissionedShipyard
1613DD-119 Asahi (Morning Sun)4 August 201519 October 20167 March 2018 MHI, Nagasaki
1614DD-120 Shiranui (Phosphorescent Light)20 May 201612 October 201727 February 2019 MHI, Nagasaki

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References

  1. ↑ Pike, John. "25DD Multipurpose Destroyer". globalsecurity.org. Retrieved 20 March 2018.
  2. ↑ Gady, Franz-Stefan (6 March 2019). "Japan Commissions New Anti-Submarine Warfare Destroyer". The Diplomat. Archived from the original on 2019-03-06. Retrieved 28 April 2021.
  3. ↑ "Defense Programs and Budget of Japan Overview of FY2013 Budget" (PDF). Japan Ministry of Defense. January 2013. Archived from the original (PDF) on 19 October 2013. Retrieved 8 January 2019.
  4. ↑ "Defense Programs and Budget of Japan Overview of FY2014 Budget" (PDF). Japan Ministry of Defense. December 2013. Archived from the original (PDF) on 2 March 2014. Retrieved 8 January 2019.
  5. 1 2 "First JMSDF 25DD-class Asahi ASW Destroyer Started Sea Trials". Navy Recognition. 27 July 2017. Retrieved 8 January 2019.
  6. ↑ Whelan, Colin S.; Kolias, Nicholas J.; Brierley, Steven; MacDonald, Chris & Bernstein, Steven (23–26 April 2012). "GaN Technology for Radars" (PDF). pairserver. Retrieved 8 January 2019.
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