Hayabusa-class patrol boat

Last updated
JS Kumataka(PG-827) 01.jpg
JS Kumataka
Class overview
Builders Mitsubishi, Shimonoseki
OperatorsNaval Ensign of Japan.svg  Japan Maritime Self-Defense Force
Preceded by PG 1-go class
Planned6
Building-
Completed6
Active6
General characteristics
Type Patrol boat
Displacement
  • 200 tonnes standard displacement
  • 240 tonnes full load
Length50.1 m (164 ft 4 in)
Beam8.4 m (27 ft 7 in)
Draft4.2 m (13 ft 9 in)
Propulsion
Speed46 knots (85 km/h; 53 mph)
Complement21
Sensors and
processing systems
Electronic warfare
& decoys		2 × Mk 36 decoys
Armament

The Hayabusa class is a guided missile patrol boat class of the Japan Maritime Self-Defense Force. Six boats were built between 2002 and 2004.

Contents

The Japan Maritime Self-Defense Force initially built three hydrofoil missile boats of the PG 1-go class between 1993 and 1995. The Hayabusa class was designed to correct the issues that arose with the preceding class. After an incident off the Noto Peninsula involving a North Korean spy ship, two ships of the class were included in the 1999 fiscal year plan.[ citation needed ]

Outline

Hull

The boat's displacement was enlarged to four times that of the PG 1-go class to improve seaworthiness. The maximum speed was increased to improve the ability to intercept ships; however, the speed increase proved to be difficult to implement.

Both double-hull and single-hull designs were considered; the single-hull design was selected for reasons of hull strength and seaworthiness. The hull is long and narrow with a V-shaped bottom, allowing for a high hull speed and improved high-speed stability.

Stealth characteristics were incorporated. The slope of the superstructure, designed to minimize direct radar reflection, was chosen using computer simulation of the radar cross section. The tripod mast and 76 mm gun also have stealth features.

Propulsion

Three LM500-G07 gas turbine engines, built under license from General Electric by Ishikawajima-Harima, provide the main propulsion.

Armament

The main armament is a pair of SSM-1B ship-to-ship missile twin launchers installed in the stern and an Otobreda 76 mm gun on the front deck. Additionally, two 12.7 mm M2 machine guns are installed on the back of the bridge.

The weapons systems for the Hayabusa class is controlled by the OYQ-8B Tactical Data Processing System. It uses a smaller AN/UYK-44 computer but is vastly superior to the previous generation AN/UYK-20. Also it is capable of supporting Link 11 data link, which the previous OYQ-5 and UYK-20 system was not able to. As a result, it is now able to provide supporting data to other ships and aircraft. This enhances offensive and defensive capability as they can now feed data into the larger Maritime Operation Force System of the Self Defense Forces.

List of ships

NameNumberLaiddownLaunchedCommissionedDecommissionedStatus
Hayabusa (はやぶさ)PG-8249 November 200013 June 2001 [1] 25 March 2002 [1] Active
Wakataka (わかたか)PG-8259 November 200013 September 2001 [1] 25 March 2002 [1] Active
Otaka (おおたか)PG-8262 October 200113 May 200224 March 2003Active
Kumataka (くまたか)PG-8272 October 200113 August 200224 March 2003Active
Umitaka (うみたか)PG-82811 December 200221 May 200324 March 2004Active
Shirataka (しらたか)PG-82911 December 20028 August 200324 March 2004Active

Citations

  1. 1 2 3 4 Saunders 2002, p. 393.

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References

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