- Construction
- References Bibliography
- External links
{{Infobox ship image| Ship image=Hr. Ms. O 9.jpg | Ship caption=O 9
}}{{Infobox ship class overview | Name=O 9 class | Builders=*Koninklijke Maatschappij De Schelde, Flushing- Nederlandsche Dok en Scheepsbouw Maatschappij, Amsterdam
- Fijenoord, Rotterdam
| NLD}} | Class before=O 8 | O 12|submarine|4}} | Cost= | Built range=1923–1926 | In service range= | In commission range=1926-1944 | Total ships completed=3 | Total ships lost= 1 | Total ships scrapped=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class= | Ship type=Submarine | Ship displacement=*526 tons surfaced | 54.66|m|ftin|0|abbr=on}} | 5.7|m|ftin|0|abbr=on}} | 3.53|m|ftin|0|abbr=on}} | Ship power= | 450|bhp|0|abbr=on}} diesel engines- 2 × {{convert|250|bhp|0|abbr=on}} electric motors
| 12|kn|abbr=on|lk=in}} surfaced- {{convert|8|kn|abbr=on}} submerged
| 3500|nmi|abbr=on|lk=in}} at {{convert|8|kn|abbr=on}} on the surface- {{convert|25|nmi|abbr=on|lk=in}} at {{convert|8|kn|abbr=on}} submerged
| Ship test depth= | Ship complement=29 | Ship armament=*2 × 21 inch bow torpedo tubes- 2 × 17.7 inch bow torpedo tubes
- 1 × 17.7 inch stern torpedo tube
- 1 x 88 mm gun
- 1 x 12.7 mm machine gun
| Ship notes=
}} | The O 9 class was a class of three submarines, built for the Royal Netherlands Navy. Used for patrols in the Dutch home waters. The class comprised O 9, O 10, and O 11. The submarines diving depth was 60 meters. ConstructionThe ships were built by three different shipyards. O 9 was built by the Koninklijke Maatschappij De Schelde in Flushing. O 10 in Amsterdam at the Nederlandsche Dok en Scheepsbouw Maatschappij and O 11 in Rotterdam at Fijenoord shipyard. | Name | Laid down | Launched | Commissioned | Decommissioned |
|---|
| O 9 | 2} | 1 December 1923 or 23 September 1922 | 7 April 1925 | 18 January 1926 | 1 December 1944 | | O 10 | 2} | 24 December 1923 | 30 July 1925 | 1 September 1926 | 11 October 1944 | | O 11 | 2} | 24 December 1922 | 19 March 1925 | 18 January 1926 | Dutch Navy: 14 May 1940 (scuttled)
German navy: September 1944 (sunk) | |
At the time of the German invasion O 11 was under repair in Den Helder. On 14 May 1940 she was scuttled there to prevent her being captured by German forces. However the Germans raised the ship and ordered it repaired. In September 1944 O 11 was sunk in Den Helder to block the entrance of the harbour. ReferencesBibliography- {{cite book|last1=Jalhay|first1=P.C.|last2=Wijn|first2=J.J.A.|title=Ik nader ongezien! De onderzeeboten van de Koninklijke Marine|year=1997|publisher=De Bataafsche Leeuw|location=Amsterdam|isbn=9067074624}}
External links{{O 9 class submarine}}{{WWIIDutchShips}} 2 : 1920s ships|O 9-class submarines |