JDS Hayashio (SS-521)

For other ships with the same name, see Japanese ship Hayashio.

JDS Hayashio (SS-521) was the lead boat of the Hayashio-class submarines. She was commissioned on 30 June 1962.

JDS Hayashio
History
Japan
Name	Hayashio (はやしお)
Namesake	Hayashio (1939)
Ordered	1959
Builder	Mitsubishi, Kobe
Laid down	6 June 1960
Launched	31 July 1961
Commissioned	30 June 1962
Decommissioned	25 July 1977
Homeport	Kure
Identification	Pennant number: SS-521
Fate	Scrapped, November 1977
General characteristics
Class & type	Hayashio-class 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

Construction and career

Hayashio was laid down at Mitsubishi Heavy Industries Kobe Shipyard on 6 June 1960 and launched on 31 July 1961. She was commissioned on 30 June 1962.^[1][2]

On 1 August 1962, the 1st Submarine Corps was newly formed and incorporated under the Kure District Force.

On 1 March 1963, the 1st Submarine was reorganized under the Self-Defense Fleet.

From 2 June to 19 August 1964, she participated in Hawaii dispatch training with JDS Wakashio.

On 1 February 1965, the 1st Submarine was reorganized into the 1st Submarine Group, which was newly formed under the Self-Defense Fleet.

At around 6:40 pm on 20 May 1970, she came into contact with a large merchant ship during a dive training in a water area about 30 km east of Tanegashima, Kagoshima Prefecture, and damaged her periscope.^[3]

She was decommissioned on 25 July 1977 and dismantled at Furusawa Steel in Etajima-cho in November 1977.^[4]