Engineering:Hayashio-class submarine

JDS Hayashio
Class overview
Name:	Hayashio class
Builders:	New Mitsubishi Heavy Industries, Kawasaki Shipbuilding Corporation
Operators:	Japan Maritime Self-Defense Force
Preceded by:	Oyashio
Succeeded by:	Natsushio class
Built:	1960–1962
In commission:	1962–1979
Planned:	2
Completed:	2
Retired:	2
General characteristics
Type:	(Hunter-killer) Submarine
Displacement:	750 long tons (762 t) (surfaced) 800 long tons (813 t) (submerged)
Length:	59 m (193 ft 7 in)
Beam:	6.5 m (21 ft 4 in)
Draft:	4.1 m (13 ft 5 in)
Depth:	6.4 m (21 ft 0 in)
Propulsion:	Diesel-electric, 2 shafts 900 BHP (surfaced) 2,300 SHP (submerged)
Speed:	11 knots (20 km/h; 13 mph) surfaced 14 knots (26 km/h; 16 mph) submerged
Complement:	40
Armament:	3 × 533 mm (21 in) torpedo tubes

The Hayashio-class submarine was the successor design to the Japanese submarine Oyashio, and the predecessor of the Natsushio class.

Boats

Project no.	Building no.	Pennant no.	Name	Laid down	Launched	Commissioned	Note
S113	8701	SS-521	Hayashio (はやしお)	6 June 1960	31 July 1961	30 June 1962	Decommissioned 25 July 1977, scrapped
	8702	SS-522	Wakashio (わかしお)	7 June 1960	28 August 1961	17 August 1962	Decommissioned 23 March 1979, scrapped