|Ordered||20 Jul 1934|
|Laid down||20 May 1935||F. Krupp Germaniawerft AG, Kiel (werk 546)|
|Launched||11 Sep 1935|
|Commissioned||30 Sep 1935||Oblt. Werner von Schmidt|
|Successes||No ships sunk or damaged|
Sunk on or about 8 October 1939 in the English Channel near Dover, in approximate position 51.10N, 01.30E, by a mine. 27 dead (all hands lost).
No messages were received from U-12 after it sailed from Wilhelmshaven on 23 September 1939 to operate in the English Channel. The boat was reported missing on 20 October when it failed to return and is believed to have been mined and sunk in the Dover-Calais mine barrage.
General notes on this boat
29 Oct 1939. The body of U-12's commanding officer, Kptlt. Dietrich von der Ropp, was washed ashore on the French coast near Dunkirk.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-12 did not suffer any casualties (we know of) until the time of her loss.
There was another U-12 in World War One
That boat was launched from its shipyard on 6 May 1910 and commissioned into the Imperial Navy on 13 Aug 1911. The Naval war in WWI was brought to an end with the Armistice signed on 11 Nov, 1918. Read about SM U 12 during WWI.
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