The ''Natsushio''-class submarines were a pair of
submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
s constructed and operated by the
Japan Maritime Self-Defense Force
, abbreviated , also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) ...
during the
Cold War
The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because the ...
. They were a development of the s and are sometimes considered the same class. They were small and limited in capability but were thought to be a successful class. They entered service in 1963–1964 and were deleted in 1978.
Design and description
The ''Natsushio''s were a development of the preceding and are sometimes considered the same class. They shared many of the same characteristics with small design improvements. They were small submarines with limited capability but considered handy and a successful class. They were air-conditioned and had good habitability for the crews. The submarines measured
long overall
__NOTOC__
Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and ...
with a
beam
Beam may refer to:
Streams of particles or energy
*Light beam, or beam of light, a directional projection of light energy
**Laser beam
*Particle beam, a stream of charged or neutral particles
**Charged particle beam, a spatially localized grou ...
of and a
draft
Draft, The Draft, or Draught may refer to:
Watercraft dimensions
* Draft (hull), the distance from waterline to keel of a vessel
* Draft (sail), degree of curvature in a sail
* Air draft, distance from waterline to the highest point on a vessel ...
of . The submarines had a
standard displacement
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...
of , with a surfaced displacement of and submerged.
The vessels were powered by a
diesel-electric system. Two shafts were powered by two Sulzer-Mitsubishi
diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...
s creating and two electric motors creating . This gave the submarines a maximum speed of surfaced and submerged. The ''Natsushio''s were armed with three
torpedo tube
A torpedo tube is a cylindrical device for launching torpedoes.
There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...
s in the
bow. They had a crew of 43.
Boats in class
See also
* - Soviet Navy
* - Royal Swedish Navy
* - Italian Navy
* - Imperial Japanese Navy
* - Imperial Japanese Navy
Notes
Citations
References
*
*
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{{Combatant ship classes of the Japan Maritime Self-Defense Force
Submarine classes
Mitsubishi Heavy Industries submarines