Natsushio 1965
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| なつしお [Natsushio] | SS523 | Shin Mitsubishi Jyuko, Kobe | 5.12.1961 | 18.9.1962 | 29.6.1963 | discarded 3.1978 | |
| ふゆしお [Fuyushio] | SS524 | Kawasaki Jyuko, Kobe | 6.12.1961 | 4.12.1962 | 17.9.1963 | discarded 6.1980 |
|
Displacement standard, t |
|
|
Displacement normal, t |
690 / 850 |
|
Length, m |
61.0 |
|
Breadth, m |
6.50 |
|
Draught, m |
4.10 max |
|
No of shafts |
2 |
|
Machinery |
2 Kobe Mitsubishi / Sulzer 6LDA25B diesel-generators, 2 Mitsubishi Electric electric motors |
|
Power, h. p. |
1350 / 1700 |
|
Max speed, kts |
12 / 15 |
|
Fuel, t |
diesel oil |
| Endurance, nm(kts) | 4000(10) / |
|
Armament |
3 - 533 TT (bow, 9) |
|
Electronic equipment |
ZPS-2 radar, JQS-3, JQO-3, JQO-4 sonars, ZLR-1 ECM suite |
|
Complement |
43 |
|
Diving depth operational, m |
150 |
Project history: Constructed under the 1961 programme, these boats were small and limited in capability. They were air-conditioned and had good habitability and a large safety factor. They were modelled after the US Barracuda and were somewhat shorter and thicker than Oyashio. In order to reduce hull resistance, an effort was made to produce a perfect a perfect double hull, external framing was used in order to improve internal space. Attention was paid to improving underwater manoeuvrability, and a 'jostick' was installed for steering. The class used a water pressure system for launching torpedoes, thus eliminating the emission of air bubbles. The main storage batteries were water-cooled.
Modernizations: None.
Naval service: No significant events.
Natsushio 1973
© Ivan Gogin, 2016