NAVYPEDIA

Photo

O9 Many thanks to Wolfgang Stöhr for additional information on this page.

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
O9		177	De Schelde, Vlissingen	9.1922	7.4.1925	1.1926	stricken 12.1944
O10		169	De Schelde, Vlissingen	12.1923	30.7.1925	9.1926	stricken 10.1944
O11		297	De Schelde, Vlissingen	12.1922	19.3.1925	1.1926	scuttled 14.5.1940

Technical data

Displacement standard, t	483
Displacement normal, t	526 / 656
Length, m	54.7
Breadth, m	5.70
Draught, m	3.53
No of shafts	2
Machinery	2 Sulzer 6-cyl diesels / 2 electric motors
Power, h. p.	900 / 500
Max speed, kts	12 / 8
Fuel, t	diesel oil
Endurance, nm(kts)	3500(8) / 25(8)
Armament	1 x 1 - 88/42 Bofors No.2, 2 - 533 TT (bow, 4), 3 - 450 TT (2 bow, 1 stern, 6)
Complement	29
Diving depth operational, m	60

Standard scale images

Graphics

Project history

Built under the 1917 programme. Smallest version of K XI class. Double-hulled, equipped by hydraulically-driven periscopes. The first twin-shaft submarines for actions in mother country waters. First Dutch submarines with a central operation by all ballast tank valves.

Modernizations

late 1920s, all: + 1 x 1 - 12.7/90

Naval service

O9 and O10 in May, 1940 escaped to Britain; they were stricken in 1944, and BU in October, 1946. O11 was scuttled at Den Helder 14.5.1940, she was salvaged by Germans, but not commissioned and again scuttled in September, 1944; she was salvaged second time 10.12.1947 and broken up.



Many thanks to Wolfgang Stöhr for additional information on this page.