Asahi-class destroyer

The Asahi-class destroyer is a destroyer class of the JMSDF - two ships are planned. The Asahi-class is optimized for undersea threats. This class used to be designated "25DD" - referring to a date on the Japanese calendar, specifically the 25th fiscal year of the Heisei period (2013). It is the third ship to hold the name after the Asahi-class destroyer escort lent from the US Navy in 1955, and the Imperial Japanese battleship. Shiranui is the third ship to hold the name after the Murakumo and Kagerō class destroyers.

JS Asahi(DD-119) at Mitsubishi Heavy Industries Nagasaki Shipyard November 25, 2017 02
JS Asahi (DD-119)
Class overview
Builders: Mitsubishi Heavy Industries
Operators:  Japan Maritime Self-Defense Force
Preceded by: Akizuki class
Cost:
  • DD119: JPY72.3 billion[1]
  • $893 million (constant 2009 USD)
Built: 2015–2019
In service: 2018-present
In commission: 2018–present
Completed: 2[2]
Active: 2
General characteristics
Type: Guided missile destroyer
Displacement:
  • 5100 tonnes standard
  • 6800 tonnes full load
Length: 151 m (495 ft 5 in)
Beam: 18.3 m (60 ft 0 in)
Draft: 5.4 m (17 ft 9 in)
Depth: 10.9 m (35 ft 9 in)
Propulsion: COGLAG, two shafts, two GE LM2500 turbines
Speed: 30 kn (56 km/h; 35 mph)
Complement: 230
Sensors and
processing systems:
Armament:
Aircraft carried: 1 × SH-60K helicopter

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) 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. According to Navy Recognition, to their knowledge the Asahi-class is the first Japanese and the world's second class of warship to be outfitted with this technology (the first being the German Baden-Württemberg-class frigate with their TRS-4D radar). The destroyer's radar is based on the FCS-3A radar used for the Akizuki-class but 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/Namesake Laid down Launched Commissioned Shipyard
1613 DD-119 Asahi (Morning Sun) 4 August 2015 19 October 2016 7 March 2018 MHI, Nagasaki
1614 DD-120 Shiranui (Phosphorescent Light) 20 May 2016 12 October 2017 27 February 2019 MHI, Nagasaki

References

  1. ^ Pike, John. "25DD Multipurpose Destroyer". www.globalsecurity.org. Retrieved 20 March 2018.
  2. ^ https://thediplomat.com/2019/03/japan-commissions-new-anti-submarine-warfare-destroyer/
  3. ^ "Defense Programs and Budget of Japan Overview of FY2013 Budget" (PDF). Japan Ministry of Defense. January 2013. Retrieved 8 January 2019.
  4. ^ "Defense Programs and Budget of Japan Overview of FY2014 Budget" (PDF). Japan Ministry of Defense. December 2013. Retrieved 8 January 2019.
  5. ^ a b "First JMSDF 25DD-class Asahi ASW Destroyer Started Sea Trials". Navy Recognition. 27 July 2017. Retrieved 8 January 2019.
  6. ^ Colin S. Whelan, Nicholas J. Kolias, Steven Brierley, Chris MacDonald, Steven Bernstein (23–26 April 2012). "GaN Technology for Radars" (PDF). pairserver. Retrieved 8 January 2019.CS1 maint: Multiple names: authors list (link) CS1 maint: Date format (link)
33DD destroyer

The 33DD (also known as DDR or Destroyer Revolution) is a Japanese destroyer in development for the Japan Maritime Self-Defense Force.

Akizuki-class destroyer (2010)

The Akizuki-class destroyer is a destroyer class of the JMSDF - four ships were planned. The Akizuki Class is intended to escort the Hyuga class and Izumo class helicopter destroyers, and safeguard the other Aegis guided warships such as the Kongō class and Atago-class of the JMSDF. The destroyer provides defence against surface, airborne and undersea threats.

This class used to be designated "19DD" - referring to a date on the Japanese calendar, specifically the 19th fiscal year of the Heisei period (2007).

FCS-3

FCS-3 is an integrated naval weapons system developed by the Japanese Defense Ministry for the Japan Maritime Self-Defense Force.

This system is composed of weapon-direction and fire-control subsystem and multi-function radar subsystem. The multi-function radar subsystem adopted active electronically scanned array (AESA) technology, and there are two sets of antennas: the larger one is a C-band radar for surveillance and tracking, the smaller one is a X-band radar as a fire-control radar.After a prolonged sea trial on board JS Asuka, this system was introduced in 2007 on the JS Hyūga (DDH-181). The enhanced version, FCS-3A, was employed on the Akizuki-class destroyers., and limited-function version, OPS-50, was also delivered for the Izumo-class helicopter destroyers. The fire-control function are omitted in the OPS-50 system, so they have only one set of antennas operating C-band.The Asahi-class destroyer features an FCS-3A radar that uses Gallium nitride technology to improve its performance.

Guided missile destroyer

A guided-missile destroyer is a destroyer designed to launch guided missiles. Many are also equipped to carry out anti-submarine, anti-air, and anti-surface operations. The NATO standard designation for these vessels is DDG. Nations vary in their use of destroyer D designation in their hull pennant numbering, either prefixing or dropping it altogether. The U.S. Navy has adopted the classification DDG in the American hull classification system.

In addition to the guns, a guided-missile destroyer is usually equipped with two large missile magazines, usually in vertical-launch cells. Some guided-missile destroyers contain powerful radar systems, such as the United States’ Aegis Combat System, and may be adopted for use in an anti-missile or ballistic-missile defense role. This is especially true of navies that no longer operate cruisers, so other vessels must be adopted to fill in the gap.

Japanese destroyer Shiranui

Three destroyers of Japan have been named Shiranui (不知火, "unknown fire"):

Japanese destroyer Shiranui (1899), a Murakumo-class destroyer of the Imperial Japanese Navy during the Russo-Japanese War

Japanese destroyer Shiranui (1938), a Kagerō-class destroyer of the Imperial Japanese Navy during World War II

JS Shiranui, an Asahi-class destroyer launched in 2017

Japanese ship Asahi

Three warships of Japan have borne the name Asahi:

Japanese battleship Asahi, a battleship launched in 1899 and sunk in 1942 after being converted to a submarine depot ship

JDS Asahi, a Cannon-class destroyer escort launched in 1943 as USS Amick she was loaned to Japan between 1955 and 1975

JS Asahi, an Asahi-class destroyer launched in 2016

List of active Japan Maritime Self-Defense Force ships

List of active ships of the Japan Maritime Self-Defense Force is a list of ships in active service with the Japan Maritime Self-Defense Force.

The JMSDF is one of the world's largest navies and the second largest navy in Asia in terms of fleet tonnage. As of 2016, the JMSDF operates a total of 155 vessels (including minor auxiliary vessels), including; four helicopter destroyers (or helicopter carriers), 26 destroyers, 10 small destroyers (or frigates), six destroyer escorts (or corvettes), 19 attack submarines, 30 mine countermeasure vessels, six patrol vessels, three landing ship tanks, 8 training vessels and a fleet of various auxiliary ships.As of 2013, a procurement list added to the current National Defense Program Guidelines (NDPG) has revealed that, among other things, an additional 48 escort vessels of various classes are planned to be added to the MSDF fleet in the coming decade. In addition, as of 7 July 2013, it was being reported that plans were under way to procure two more Aegis equipped destroyers in order to bolster ongoing BMD efforts, the first to be contracted for in fiscal year 2015 and the other in fiscal year 2016.

List of ship launches in 2016

The list of ship launches in 2016 includes a chronological list of ships launched in 2016.

Mark 41 Vertical Launching System

The Mark 41 Vertical Launching System (Mk 41 VLS) is a shipborne missile canister launching system which provides a rapid-fire launch capability against hostile threats. The Vertical Launch System (VLS) concept was derived from work on the Aegis Combat System.

Type 07 Vertical Launch Anti-submarine rocket

Type 07 Vertical Launch Anti-submarine rocket (07式垂直発射魚雷投射ロケット, 07-shiki-suichoku-hassha-gyorai-tōsha-roketto) is a Japanese ship-launched anti-submarine missile.

Combatant ship classes of the Japan Maritime Self-Defense Force
Helicopter Destroyer (DDH)
Guided Missile Destroyer (DDG)
Destroyer (DD)
All Purpose Destroyer (DDA)
Anti Submarine Destroyer (DDK)
Destroyer Escort (DE)
Frigate Multi-Purpose / Mine(FFM)
Patrol Frigate (PF)
Submarine (SS)
Ocean Minehunters/Minesweepers (MHS)
Coastal Minehunters/Minesweepers (MHC)
Amphibious Warfare

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