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 JSKumataka | |
| Class overview | |
|---|---|
| Builders | Mitsubishi,Shimonoseki |
| Operators |  Japan Maritime Self-Defense Force |
| Preceded by | PG 1-go class |
| Planned | 6 |
| Building | 0 |
| Completed | 6 |
| Active | 6 |
| General characteristics | |
| Type | Patrol boat |
| Displacement |
|
| Length | 50.1 m (164 ft 4 in) |
| Beam | 8.4 m (27 ft 7 in) |
| Draft | 4.2 m (13 ft 9 in) |
| Propulsion |
|
| Speed | 46knots (85 km/h; 53 mph) |
| Complement | 21 |
| Sensors & processing systems |
|
| Electronic warfare & decoys | 2 ×Mk 36 decoys |
| Armament | |
TheHayabusa-class is aguided missilepatrol boat class of theJapan Maritime Self-Defense Force (JMSDF). Six boats were built between 2002-04.
The Japan Maritime Self-Defense Force initially built threehydrofoil missile boats of thePG 1-go class between 1993-95. TheHayabusa-class was designed to correct the issues that arose with the preceding class. After an incident off theNoto Peninsula involving aNorth Koreanspy ship, two ships of the class were included in the 1999 fiscal year plan.[citation needed]
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.
Three LM500-G07gas turbine engines, built under license fromGeneral Electric byIshikawajima-Harima, provide the main propulsion.
The main armament is a pair ofSSM-1B ship-to-ship missile twin launchers installed in the stern and anOtobreda 76 mm gun on the front deck. Additionally, two12.7 mm M2 machine guns are installed on the back of the bridge.
The weapons systems for theHayabusa-class are controlled by the OYQ-8B Tactical Data Processing System. It uses a smallerAN/UYK-44 computer, which is vastly superior to the previous generationAN/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.
| Name | Number | Laid down | Launched | Commissioned | Status |
|---|---|---|---|---|---|
| Hayabusa [ja](はやぶさ) | PG-824 | 9 November 2000 | 13 June 2001[1] | 25 March 2002[1] | Active |
| Wakataka [ja](わかたか) | PG-825 | 9 November 2000 | 13 June 2001[1] | 25 March 2002[1] | Active |
| Otaka [ja] (おおたか) | PG-826 | 2 October 2001 | 13 May 2002 | 24 March 2003 | Active |
| Kumataka [ja] (くまたか) | PG-827 | 2 October 2001 | 2 August 2002 | 24 March 2003 | Active |
| Umitaka [ja] (うみたか) | PG-828 | 4 October 2002 | 21 May 2003 | 24 March 2004 | Active |
| Shirataka [ja] (しらたか) | PG-829 | 4 October 2002 | 8 August 2003 | 24 March 2004 | Active |
