Maya-class destroyer

The Maya class of guided missile destroyers (まや型護衛艦, Maya-gata Goeikan) in the Japan Maritime Self-Defense Force is a modified version of the Atago class, with an updated Aegis Combat System and electric propulsion system.[2] Maya was commissioned on March 19, 2020.[3] Haguro is scheduled to be commissioned in March 2021.

JS Maya
Class overview
Name: Maya class
Builders: Japan Marine United
Operators:  Japan Maritime Self-Defense Force
Preceded by: Atago class
Cost: ¥164.8 billion[1]
Built: 2017–2021
In commission: 2020–
Planned: 2
Completed: 2
Active: 1
General characteristics
Type: Guided missile destroyer
Displacement:
  • 8,200 tons standard
  • 10,250 tons full load
Length: 169.9 m (557 ft 5 in)
Beam: 22.2 m (72 ft 10 in)
Draft: 6.4 m (21 ft 0 in)
Depth: 13 m (42 ft 8 in)
Propulsion:
Speed: 30 knots (56 km/h)
Boats & landing
craft carried:
Complement: 300
Sensors and
processing systems:
Electronic warfare
& decoys:
Armament:
Aircraft carried: 1 × SH-60K helicopter (not loaded usually)
Aviation facilities: Flight deck and enclosed hangar for one helicopter

Background

The Maritime Self-Defense Force (MSDF) began construction of the Aegis-equipped Kongō class from FY1988.[4] And in FY2002 and 2003, a modified version, Atago class, was also added for its fleet.[4]

However, even after the four Kongō-class and two Atago-class destroyers had been commissioned, it was still necessary to build two more Aegis-equipped destroyers to replace Hatakaze class, the best and last survivor of Tartar-equipped destroyers.[4] The construction of these two Aegis-equipped destroyers was included in the National Defense Program Guidelines for FY2014 and beyond.[4] The first ship, JS Maya, was built in the FY2015 budget.[2]

Design

While it shares the same design characteristics as the Atago class, the Maya class possesses a larger hull to install a hybrid-electric propulsion system.[2]

Maya-class destroyers are engineered with a COGLAG (Combined Gas turbine-eLectric And Gas turbine) propulsion system, a modification of the combined gas and gas propulsion system employing turbine-electric transmission for low-speed cruising. The JMSDF had been testing a COGLAG propulsion system on JS Asuka. Then, the adoption of the system for surface combatants began with the Asahi class. While the Asahi-class system had a low voltage distribution of 450 volts, the Maya-class system is equipped with a more advanced system that can handle a high voltage distribution of 6,600 volts.[2]

The JMSDF already uses an integrated electric propulsion system for auxiliary vessels, and is expected to expand to surface combatant ships in the future in light of its future weapon accommodation.[2]

Equipment

The Maya class features the newer Aegis Weapon System (AWS) Baseline 9C (referred as J7 in Japan), compared with the Atago class using the Baseline 7 system (now being updated to Baseline 9C with modernization).[2][5] With this system, these destroyers are equipped with the Cooperative Engagement Capability (CEC) system. This will allow the ship to share surveillance or targeting information between other CEC equipped assets, whether that be from ships from the American or Australian Navy or from American or Japanese E-2 Hawkeye.[6] In addion to the AWS, they are also equipped with an Aegis BMD 5.1 system; they are the first JMSDF Aegis vessels to be capable of ballistic missile defense (BMD) from the time of its commissioning.[2][3]

In addition to the existing SM-2MR Block IIIB surface-to-air missiles, the SM-6 will also be installed in the future.[3][7] The SM-6 missiles can be networked to the CEC system and thus allow it to receive targeting information from other CEC equipped sources. While the primary role of the SM-6 is to intercept enemy aircraft and cruise missiles, the SM-6 is also capable of intercepting ballistic missiles in their terminal phase and can double as an anti-ship missile.[2]

As anti-ballistic missiles, these ships are equipped with the SM-3 Block IA, IB and IIA. The SM-3 Block IIA is the latest variant of the SM-3 missiles, being re-designed drastically to defend broader areas.[2][3]

The ship will use Type 17 Ship-to-Ship Missiles (SSM-2),[6] in addition to an existing Type 90 (SSM-1B).[3]

Future armaments for the ships is slated to include locally built railgun and laser point-defense system.[8]

Ships in the class
Pennant No. Name Laid down Launched Commissioned Builder
DDG-179 JS Maya 17 April 2017 30 July 2018 19 March 2020 JMU, Yokohama
DDG-180 JS Haguro 23 January 2018 17 July 2019 Scheduled for 2021

Namesakes

Maya shares her name with the World War II era Japanese Takao-class heavy cruiser Maya,[9] while Haguro shares her name with Myōkō-class heavy cruiser Haguro.[10]

References
  1. REIJI YOSHIDA (30 July 2018). "Japan launches next-generation destroyer carrying latest version of the Aegis anti-missile system". Retrieved 30 July 2018 – via Japan Times Online.
  2. Tokumaru 2018.
  3. Inaba 2020.
  4. Yamazaki 2014.
  5. "Lockheed Martin gets $135m contract for Aegis Baseline 9 deliveries to Japan". Naval Today. 18 December 2017. Retrieved 10 January 2019.
  6. Rimland 2018.
  7. Takahashi, Kosuke (3 September 2018). "Japan's Improved Atago-class to field SM-6 air-defence missiles". Jane's. Retrieved 10 January 2019.
  8. "Japan Defense Ministry Unveiled Details of "27DD" Class Railgun & Laser armed AEGIS Destroyer". Navy Recognition. 22 July 2015. Retrieved 8 January 2019.
  9. "海自護衛艦「まや」進水　イージス艦７隻目、「共同交戦能力」初搭載　情報共有で屈指の防空能力" (in Japanese). Sankei Shimbun. 30 July 2018. Retrieved 31 July 2018.
  10. Xavier Vavasseur (17 July 2019). "JMU Launches 'Haguro' - Second Maya-Class AEGIS Destroyer For The JMSDF". Naval News. Retrieved 17 July 2019.

Bibliography
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