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fighting ships of the world

REGIA MARINA (ITALY)

SUBMARINES

"CA" type I midget submarines (1938)

CA1

Names

CA1, 2

Builders

Caproni, Milano: CA1, 2

Completed

4/1938: CA1, 2

Losses

CA1 (9/9/1943), CA2 (captured by Germany 9/9/1943)

Transfers

none

Discarding

none

  

Displacement standard, t

 

Displacement normal, t

13.3 / 16.1

Length, m

10.0

Breadth, m

1.96

Draught, m

1.60

No of shafts

1

Machinery

MAN diesel / Marelli electric motor

Power, h. p.

60 / 25

Max speed, kts

6.3 / 5

Fuel, t

diesel oil

Endurance, nm(kts) 700(4) / 57(3)

Armament

2 - 450 TT (ext cradles, 2)

Complement

2

Diving depth operational, m 55

Ship project history: First midget submersibles of Italian Navy, created after the First World War. They were projected in an initiative order by Caproni, then Navy has become interested in them and has given out the order for building of two midgets. It was originally supposed to use them as anti-submarine crafts. Trials have passed unsuccessfully: boats have appeared very unstable on periscop depth at the slightest sea motions.

In 1941 they were transferred to 10th MAS flotilla for usage as underwater transports. Diesels, torpedoes and periscope were removed. Boats were arranged for transportation of eight 100kg explosive charges and three frogmen. It was supposed to use these boats for attack of harbours on Western coast of USA where it was supposed to deliver them on a deck of large submarines.

Modernizations: 1941, both were rebuilt as special carriers, as follows:

Displacement standard, t

 

Displacement normal, t

11.8 / 13.8

Length, m

10.0

Breadth, m

1.96

Draught, m

1.60

No of shafts

1

Machinery

Marelli electric motor

Power, h. p.

25

Max speed, kts

7 / 6

Fuel, t

---

Endurance, nm(kts) 70(2)

Armament

8 x 100kg explosive charges

Complement

3

Diving depth operational, m 55

Naval service: No significant events.

 

Ivan Gogin, 2009-14