Hibiki-class ocean surveillance ship

The Hibiki-class ocean surveillance ship is a class of surveillance ships operated by the Japan Maritime Self-Defense Force.^[1][2] The ships have a small-waterplane-area twin hull (SWATH) design.^[3]

History

The Hibiki class was developed in response to the launch of the Kilo-class submarines by the Soviet Union, and their deployments in the waters near Japan.^[4] The Defense Agency announced plans to develop a surveillance ship in 1989.^[4]

The first Hibiki-class vessel was commissioned on January 23, 1991, and the second, Harima, on March 10, 1992.^[5]

Construction

All three vessels of the class have been built by Mitsui Engineering & Shipbuilding at its Tamano shipyard.^[1]

Operations

Hibiki and Harima operate out of Kure, Hiroshima.^[4] The United States and Japan reportedly split the costs of operating the Hibiki vessels, which approximately US$20 million per year.^[4]

Characteristics

Hibiki-class vessels have a beam of 30 metres (98 ft 5 in), a top speed of 11 knots (20 km/h; 13 mph), and a standard range of 3,800 nautical miles (7,000 km; 4,400 mi).^[6] Each vessel has a crew of 40, including five American civilian technicians, and a flight deck for helicopters to operate off of.^[1][7] They are able to deploy on station for 90 days.^[7]

The vessels have an AN/UQQ-2 Surveillance Towed Array Sensor System (SURTASS), which is installed in the United States.^[2][7] Data from the sensors is relayed through the Defense Satellite Communications System, and processed and shared with the United States.^[7] The data is fed into the Integrated Undersea Surveillance System.^[4]

Propulsion is provided by four Mitsubishi S6U-MPTK diesel electric engines.^[3] The third ship was equipped with a Daihatsu diesel MTU.^[8]

Ships in the class

Pennant no.	Name	Laid down	Launched	Commissioned	Home port	Notes
AOS-5201	Hibiki	28 November 1989	27 July 1990	30 January 1991	Kure
AOS-5202	Harima	26 December 1990	11 September 1991	10 March 1992	Kure
AOS-5203	Aki	October 2018	15 January 2020	4 March 2021		[1]
FY Reiwa4 AOS[9]	TBA	TBA	TBA	TBA

References

1. Dominguez, Gabriel (February 3, 2020). "Japan launches third Hibiki-class ocean surveillance ship". Jane's Information Group.
2. "AOS Hibiki Class". GlobalSecurity.org. Archived from the original on February 15, 2017.
3. "AOS Hibiki Class". GlobalSecurity.org. Archived from the original on September 5, 2009.
4. War is Boring (July 4, 2014). "Japan's Ears on the Sea". Medium. Archived from the original on July 8, 2017.
5. Kim, Duk-Ki (12 October 2012). Naval Strategy in Northeast Asia: Geo-strategic Goals, Policies and Prospects. Routledge. p. 207. ISBN 978-1-136-32636-3.
6. Jane, Frederick Thomas (2010). Jane's Fighting Ships. S. Low, Marston & Company. p. 433. ISBN 978-0-7106-2920-3.
7. Graham, Euan (16 November 2005). Japan's Sea Lane Security: A Matter of Life and Death?. Routledge. p. 404. ISBN 978-1-134-25091-2.
8. "ダイハツディーゼルの新たな取組みについて" (PDF). dhtd.co.jp (in Japanese). Retrieved 26 July 2023.
9. "我が国の防衛と予算" (PDF) (in Japanese). Japanese Ministry of Defense. Retrieved 26 July 2023.