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).

Fuyuzuki(DD-118)
JS Fuyuzuki (DD-118)
Class overview
Preceded by: Takanami-class destroyer
Succeeded by: Asahi-class destroyer
Cost:
  • DD115: JPY84.4 billion[1]
  • $893 million (constant 2009 USD)
Built: 2009–2012
In commission: 2012–
Planned: 4
Completed: 4
Active: 4
General characteristics
Type: Guided missile destroyer
Displacement:
  • 5000 tonnes standard
  • 6800 tonnes full load
Length: 150.5 m (493 ft 9 in)
Beam: 18.3 m (60 ft 0 in)
Draft: 5.3 m (17 ft 5 in)
Depth: 10.9 m (35 ft 9 in)
Propulsion: COGAG, two shafts, four Rolls Royce Spey SM1C turbines
Speed: 30 kn (56 km/h; 35 mph)
Complement: 200
Sensors and
processing systems:
  • ATECS (advanced technology command system)
  • OYQ-11 ACDS
  • FCS-3A AAW system
  • OQQ-22 ASW system
  • NOLQ-3D EW system
  • OPS-20C surface search radar
Armament:
Aircraft carried: 1 × SH-60K helicopter

Design

JS Akizuki (DD-115) at Sagami bay, 2012

The hull structure was based on the one of the Takanami class destroyer. There are many small improvements like, for example, cleaner lines to reduce the radar signature and decoys for torpedoes; but the principal changes can be summed up as more powerful engines, sensors, sonar and the indigenous ATECS battle management system that has been called the "Japanese AEGIS". The main gas turbine engines are standardized on a higher-powered version of the Rolls-Royce Spey SM1C, in contrast to the combination of Rolls-Royce SM1C and General Electric LM2500 turbines used in the Takanami class.[2]

Equipment

The purpose of this class is to shield the Kongō class from air, surface and subsurface threats. Main features of the class include enhanced C4ISR and Anti-Aircraft Warfare (AAW) capability, with an OYQ-11 advanced Combat Direction Sub-system (CDS) and FCS-3A AAW weapon sub-system.[2]

OYQ-11
This is the first CDS adopting a fully distributed computing architecture to be implemented in general-purpose destroyers of the JMSDF. AN/UYQ-70 workstations form the basic computing platform, with Link 16 datalinks. In addition to the CDS, this class is equipped with SATCOM terminals linked to Superbird satellites, part of the Maritime Operation Force (MOF) system. The MOF system is the operational C4I system used in the fleet of the JMSDF, based on the ILOG architecture and interoperable with other JSDF forces. There are also USC-42 DAMA terminals for GCCS-M, the American counterpart of the MOF system.[3]
FCS-3A
This is a domestically developed AAW combat system. It consists of two main components, one is an dual-band and multimode active electronically scanned array radar, and the other is the fire-control system. The FCS-3A is the derivative of the FCS-3 of the Hyūga-class helicopter destroyer, changing material of its transmitter-receiver modules from Gallium arsenide to Gallium nitride and introducing additional Local Area Defense (LAD) capability. An ESSM SAM VLS is integrated with the FCS-3A.[4]

Anti-submarine and Electronic Warfare (EW) capabilities of the Akizuki class have been enhanced, with a new OQQ-22 integrated sonar suite sub-system (hull-sonar and OQR-3 towed array; - a Japanese equivalent of the American AN/SQQ-89), and the NOLQ-3D digitalized EW suite sub-system. These sub-systems communicate across a NOYQ-1B wide area network. In totality these systems are comparable to those of the Zumwalt-class destroyer.[3]

Gallery

JS Akizuki (DD-115) - starboard view

Starboard view JS Akizuki

JS Akizuki (DD-115) - bow view

Bow view

DD115

Bridge detail with 2 AESA arrays

Teruzuki (DD-116), Sawayuki (DD-125) en Asuka (ASE-6102) aan de Yoshikura Pier, -2 Jun. 2013 b

JS Teruzuki at Yokosuka naval base, 2013

DD-116Teruduki&DD117Suzutuki

JS Teruzuki (DD-116) & JS Suzutuki (DD-117) at Nagasaki shipyard

Ships in the class

Building no. Pennant no. Name/Namesake Laid down Launched Commissioned Shipyard
2244 DD-115 Akizuki (Autumn Moon) 17 July 2009 13 October 2010 14 March 2012 MHI, Nagasaki
2245 DD-116 Teruzuki (Bright Moon) 9 July 2010 15 September 2011 7 March 2013 MHI, Nagasaki
2246 DD-117 Suzutsuki (Clear Moon) 18 May 2011 17 October 2012 12 March 2014 MHI, Nagasaki
2247 DD-118 Fuyuzuki (Winter Moon) 14 June 2011 22 August 2012 13 March 2014 Mitsui, Tamano

References

  1. ^ http://www.globalsecurity.org/military/world/japan/19dd.htm
  2. ^ a b SOW editorial office (November 2010). "Technical characteristics of 19DD". Ships of the World. Kaijinn-sha (732): 84–99.
  3. ^ a b Makoto Yamazaki (October 2011). "Combat systems of modern Japanese destroyers". Ships of the World. Kaijin-sha (748): 98–107.
  4. ^ Keiichi Nogi (March 2010). "1. Missiles (Shipboard weapons of JMSDF 1952-2010)". Ships of the World. Kaijin-sha (721): 82–87.

External links

Active electronically scanned array

An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled array antenna in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna. In the AESA, each antenna element is connected to a small solid-state transmit/receive module (TRM) under the control of a computer, which performs the functions of a transmitter and/or receiver for the antenna. This contrasts with a passive electronically scanned array (PESA), in which all the antenna elements are connected to a single transmitter and/or receiver through phase shifters under the control of the computer. AESA's main use is in radar, and these are known as active phased array radar (APAR).

The AESA is a more advanced, sophisticated, second-generation of the original PESA phased array technology. PESAs can only emit a single beam of radio waves at a single frequency at a time. The AESA can radiate multiple beams of radio waves at multiple frequencies simultaneously. AESA radars can spread their signal emissions across a wider range of frequencies, which makes them more difficult to detect over background noise, allowing ships and aircraft to radiate powerful radar signals while still remaining stealthy.

Akizuki-class destroyer

Akizuki-class destroyer may refer to:

Akizuki-class destroyer (1942), the "Type B Destroyer" used by the Imperial Japanese Navy during World War II

Super Akizuki-class destroyer, a developed version of the 1942 class

Akizuki-class destroyer (1959), a Cold War era destroyer used by the Japanese Maritime Self-Defense Force for anti-submarine warfare.

Akizuki-class destroyer (2010), a class of escort destroyers currently under construction for the Japanese Maritime Self-Defense Force

Rolls-Royce Marine Spey

The Rolls-Royce Marine Spey is a marine gas turbine based on the Rolls-Royce Spey and TF41 aircraft turbofan engines. The Marine Spey currently powers seven ship classes including the Royal Navy's Type 23 frigates and provides a power output of 19.5 MW (about 26,150HP). The Marine Spey incorporates technology from the Tay and RB211.

Akizuki-class destroyers
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