Jolly Roger Class
O 2
Boats in this Class
O 2, O 3
O 4, O 5


O 2 departing Den Helder harbour.O 2 departing Den Helder harbour.

Boat O 2 O 3 O 4 O 5
Yard # 133 138 147 148
Type Patrol submarine for the Dutch home waters
Class name O 2. Named after first of class. "O" stands for "Onderzeeboot" (submarine)
Ordered 1 June 1909 18 Mar 1910 18 Dec 1911 18 Dec 1911
Laid down 11 Oct 1909 31 Dec 1910 15 June 1912 15 June 1912
Launched 30 Jan 1911 30 July 1912 05 Aug 1913 02 Oct 1913
Commissioned 01 Dec 1911 11 Feb 1913 17 June 1914 20 Aug 1914
Decommissioned 1930 1932 1935 1935
Fate 1932/33  ? ? ? ?
Other names O II O III O IV O V
Design The engineers M.F. Hay and P. Koster of Whitehead & Company, Fiume, U.K.
Also known as the Hay-Whitehead type, possibly A-3.
Shipyard Koninklijke Maatschappij De Schelde, Vlissingen, the Netherlands
Cost Hfl 639,150 Dutch guilders
Le x Be x Dr 32.13 m x 3.30 m x 2.73 m
Displacement 134 t / 149 t
Engine One 6-cylinder M.A.N. diesel engine, 2-stroke, 280 apk
Main motor 145 apk
Batteries 60 cells, 3300 Ah during 3 hours
Snort "Yes", see notes
Propellers 1
Speed surf/subm 11 kts / 8 kts
Range surf/subm 500 nm at 10 kts / 35 nm at 7 kts
Diving depth 25 m, 40 m during trials (no crew on board)
Complement 10
Torpedo tubes 2 x 18" bow. Tubes above each other
Armament 4 torpedoes type I 45
Guns 1 machine gun
Periscopes 1 Zeiss 1 Zeiss 19??: Two retractable
periscopes, stroke 1.5 m
1 Zeiss
Sonar - - 19??: passive sonar -
Notes Single-hull type with one main ballast tank. Poor stability due to regular hor. and vert. plane failures.

The earliest reports of "snorts" being used on Dutch submarines are from before 1918! The boats of the O 4 type had a small (and problematic) pipe.
The length of this pipe could be changed, it functioned like a telescopic system. Actually this was the pipe of the "battery ventilation" and it was situated forward on the bridge. When the main tanks where flooded, and the hatches closed, air could be sucked in through the pipe. This enabled the diesels to run. The Dutch called it "getrimd dieselen". This was a quite dangerous operation because when sailing too deep the pipe had to be retracted completely before the valve (that should keep water out of the boat) functioned. When closing too late water could get to the batteries and create a dangerous situation. See the O 19, O 16 and K II class for more snort info.








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