Jolly Roger Class
O 12
Boats in this Class
O 12, O 13
O 14, O 15

 

O 15, O 14 and O 13, Amsterdam 1938. (Photo: Collection G.D. Horneman). O 15, O 14 and O 13, Amsterdam 1938

 

Boat O 12 O 13 O 14 O 15
Pennant #     P 14 P 15, N 15
Yard # 186 190 191 319
Type Coastal submarine for the Dutch home waters.
Class name O 12. Named after first of class. "O" stands for "Onderzeeboot" (submarine)
Ordered 4 Oct 1927 14 May 1928 14 May 1928 Oct 1929
Laid down 20 Oct 1928 1 Dec 1928 29 Dec 1928 3 Mar 1930
Launched 8 Nov 1930 18 Apr 1931 3 Oct 1931 27 May 1931
Commissioned Dutch Navy:
20 July 1931
German Navy:
30 Jan 1943
1 Oct 1931 4 Mar 1932 28 July 1932
Decommissioned German Navy scuttled:
6 July 1945
13 June 1940 26 June 1943 1 Sep 1945
Fate Broken up June 1940
Mined?
26 June 1943
Stripped, sold f scrap
Oct 1946
Sold f brake up
Other names German: U-D2 - - -
Design Dutch. By the J.J. van der Struyff, B.Sc.
Shipyard Koninklijke Maatschappij De Schelde,
Vlissingen
Fijenoord,
Rotterdam
Le x Be x Dr 60.42 m x 6.83 m x 3.6 m
Displacement
Stnd/Surf/Subm
548 t / 610 t / 754 t
Engines Two 6-cylinder Sulzer diesel engines,
2-stroke, 2 x 900 apk
Two 6 cyl. M.A.N. dsls,
2-stroke, 2 x 900 apk
Main motor 2 W. Schmitt main motors and generators, 2 x 310 apk
Batteries 120 cells, 5610 Ah during 3 hours. Also 8000 Ah capacity is being reported.
Propellers 2
Speed surf/subm 16 kts / 8 kts
Range surf/subm 3500 nm at 10 or 8 kts / 26 nm at 8 kts
Diving depth 60 m
Complement 29/31
Torpedo tubes 4 x 21" bow, 1 x 21" stern. First boats with 21" tubes only.
Torpedo type When built: II53? and III53
World War II: Mk II
Armament 10 torpedoes
Guns 2 x 40 mm (retractable, 2x1), 1 x 12.7 mm machine gun (probably Browning)
2 x 40 mm later removed (see notes)
Periscopes 1 x 4,65 m stroke (front), 1 x 4,74 m stroke (back). Raised and lowered
electrically, diameter 180 mm.
Notes - Boats had pour stability (up to 35 list while surfacing)
  This was improved by widening the middle main ballast tank #2 in 1936/1937 and reducing "top weight"
  by removing both 4 cm machineguns and one air conditioner (year unknown).
  After these modifications it was reported that O 14 (and probably her sister ship as well) had good stability.
- First Dutch boats equipped with a low pressure lens blower and electric raising/lowering of the periscopes.

 

 

 

 

 

 

 

 

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