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fighting ships of the world

K-U-K MARINE - AUSTRO-HUNGARIAN NAVY (AUSTRIA-HUNGARY)

SUBMARINES

U20 submarines (1916-1917)

U23 1917

Name Yard No Builder Laid down Launched Comp Fate
U20   UBAG // Marinearsenal Pola 9/1915 18/9/1916 3/1917 sunk 5/7/1918
U21 570 UBAG-Linz // Whitehead, Fiume 10/1915 15/8/1916 11/1916 to Italy 1920
U22 571 UBAG-Linz // Whitehead, Fiume 12/1915 27/1/1917 6/1917 to France 1920
U23   UBAG // Marinearsenal Pola 12/1915 5/1/1917 6/1917 sunk 21/2/1918

 

Displacement standard, t

 

Displacement normal, t

173 / 210

Length, m

38.8

Breadth, m

3.97

Draught, m

2.75

No of shafts

1

Machinery

diesel / electric motor

Power, h. p.

450 / 300

Max speed, kts

12 / 9

Fuel, t

diesel oil

Endurance, nm(kts) 2000(7) / 54(4)

Armament

U20 - 22: 1 x 1 - 66/24 G. L/26 K.15 BAK, 2 - 450 TT (bow, 2)

U23: 1 x 1 - 47/40 SFK L/44 S, 2 - 450 TT (bow, 2)

Complement 18
Diving depth operational, m 50?

Ship project history: Between 1911 and 1912 the Royal Danish Navy ordered 3 single-hulled Havmanden class (A type) boats from Whitehead's Fiume yard, and the Austro-Hungarian Navy seized the plans after the outbreak of war and ordered 4 boats on 27 March 1915. Following the pattern of the Dual Monarchy, construction was divided between the Austrian Pola N Yd (U20 and U21) and the Hungarian UBAG yard. The subcontracts were also divided up, which led to a lot of technical troubles, later modifications and modernizations during construction, finally resulting in an unfortunate and long-delayed type. They were not commissioned until the end of 1917 and operated without success.

Modernizations: None.

Naval service: U23 was sunk on 21 February 1918 with an explosive paravane, when she attacked a convoy in the Otranto straits. U20 was torpedoed by the Italian submariner F12 off the Tagliamento estuary; raised in 1962 she was scrapped. The CT plus a small midships section of this boat is now exhibited in the Heeresgeschichtliches Museum in Vienna. U21 was ceded to Italy in 1920, U22 to France, and both were scrapped.

U20

Ivan Gogin, 2014