Class O 7

Boats in this Class O 7

O 7 under construction. Note the steering propeller. Rotterdam, July 1916

Boat	O 7
Yard #	265
Type	Patrol submarine for the Dutch home waters
Class name	O 7. Named after first of class. "O" stands for "Onderzeeboot" (submarine)
Ordered	8 May 1913
Laid down	12 May 1914
Launched	22 July 1916
Commissioned	23 Dec 1916
Decommissioned	21 Nov 1939
Fate	1944 Sunk. 19?? Raised and scrapped
Design	William Denny & Brothers, Dumbarton, U.K.
Shipyard	Maatschappij Fijenoord, Rotterdam, the Netherlands
Le x Be x Dr	34.24 m x 3.9 m x 2.88 m
Displacement Stnd/Surf/Subm	168 t / 178.6 t / 209.266 t
Engine	One 6-cylinder M.A.N. diesel engine, 2-stroke, 350 apk
Main motor	210 apk, some source report 185 shp.
Batteries	60 cells, 4610 Ah during 3 hours
Shafts	1, plus steering propeller.
Speed surf/subm	11.5 kts / 8.5 kts
Range surf/subm	750 nm at 10 kts / 42 nm at 7 kts
Fuel	6.548 t
Diving depth	40 m
Complement	15
Torpedo tubes	2 x 18" bow, 1 x 18" stern
Armament	5 torpedoes type I 45 and II 45
Guns	1 machine gun
Periscopes	2 Zeiss
Notes	Single-hull type. The O 7 and O 6 (O 6 class) are often regarded as sister ships. An unusual feature is the steering propeller, situated just ahead of the main propulsion propeller and rudder.

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