- Service history Before World War II During World War II
- References
{{Infobox ship image| Ship image=Hr. Ms. O 12.jpg | Ship caption=HNLMS O 12 after being launched
}}{{Infobox ship career | Hide header= | Ship country=Netherlands | Netherlands}} | Ship name=HNLMS O 12 | Ship namesake= | Ship owner= | Ship operator= | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder=Koninklijke Maatschappij De Schelde, Vlissingen | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down=20 October 1928 | Ship launched=8 November 1930 | Ship sponsor= | Ship christened= | Ship completed= | Ship acquired= | Ship commissioned=20 July 1931 | Ship recommissioned= | Ship decommissioned=14 May 1940 | Ship maiden voyage= | Ship in service= | Ship out of service=22 January 1954 | Ship renamed= | Ship reclassified= | Ship refit= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification= | Ship motto= | Ship nickname= | Ship honours= | Ship honors= | Ship captured= | Ship fate= | Ship status= | Ship notes= | Ship badge=
}}{{Infobox ship characteristics | Hide header= | Header caption= | O 12|submarine}} | Ship type= | Ship displacement=*610 tons surfaced | 60.4|m|ftin|0|abbr=on}} | 6.8|m|ftin|0|abbr=on}} | 3.6|m|ftin|0|abbr=on}} | Ship power= | 900|bhp|0|abbr=on}} diesel engines- 2 × {{convert|310|bhp|0|abbr=on}} electric motors
| 16|kn|abbr=on|lk=in}} surfaced- {{convert|8|kn|abbr=on}} submerged
| 10000|nmi|abbr=on|lk=in}} at {{convert|12|kn|abbr=on}} on the surface- {{convert|28|nmi|abbr=on|lk=in}} at {{convert|8.5|kn|abbr=on}} submerged
| Ship test depth= | Ship complement=29-31 | Ship armament=*4 × 21 inch bow torpedo tubes- 1 × 21 inch stern torpedo tube
- 2 × 44 mm guns[1]
- 1 × 12.7 mm machine gun
| Ship notes=
}} | O 12 was a {{sclass-|O 12|submarine}} of the Royal Netherlands Navy. Built at Koninklijke Maatschappij De Schelde in Vlissingen,[1] it was launched in 1930 but was unable to take part in military action during World War II. After being scuttled by the Dutch Navy, it was raised by Nazi Germany's Kriegsmarine and taken into service as UD-2, and then scuttled again.[2]Service historyBefore World War IIIn 1935, O 12, with {{HNLMS|O 13||2}}, {{HNLMS|O 15||2}}, {{HNLMS|Hertog Hendrik||2}}, {{HNLMS|Van Ghent|1926|2}}, {{HNLMS|Kortenaer|1927|2}} and {{HNLMS|Z 5||2}}, sailed around the North Sea making stops at Göteborg and Oslo. Two years later, O 12 sailed with sister ship {{HNLMS|O 14||2}} to Surinam and Curaçao.[2] During World War IIDuring the German attack on the Netherlands in 1940, O 12 was at the naval wharf of Willemsoord, Den Helder for periodic maintenance. Unable to make the trip across the North Sea to England, the ship was scuttled.[2] The German occupying forces had O 12 raised and sent it to the Wilton-Fijenoord wharf in Rotterdam for repairs. On 30 January 1943, it was taken into service by Nazi Germany's Kriegsmarine, as UD-2. On 6 July 1944, it was taken out of service and moved to Kiel, where it was scuttled in the harbor just before the end of the war. Afterwards, UD-2 was raised and demolished.[2] References1. ^1 {{en icon}} Dutchsubmarines.com :: O 12 class
2. ^1 2 3 {{en icon}} Dutch Submarines.com :: O 12
{{coord|8|40|N|111|40|E|display=title}}{{O 12 class submarine}}{{Foreign U-boats |state=collapsed}}{{May 1940 shipwrecks}}{{May 1945 shipwrecks}}{{Subject bar
| portal1=Military of Germany
| portal2=Submarine
| portal3=World War II
}}{{DEFAULTSORT:O-12}} 7 : 1930 ships|Ships built in the Netherlands|World War II submarines of the Netherlands|O 12-class submarines|Naval ships of the Netherlands captured by Germany during World War II|Maritime incidents in May 1940|Maritime incidents in May 1945 |