Patrol info for U-21
Date lookup for 21 Mar 1940
| Departure | Arrival / Fate | Duration | ||
| 21 Mar 1940 | Wilhelmshaven | 27 Mar 1940 | Mandal, Norway | 7 days |
Commander | Officers * |
 Kptlt. Wolf-Harro Stiebler |
WO Oblt. Robert Bartels |
Patrol in the North Sea off Southern Norway. At 23.30 hours on 26 March, U-21 ran aground at the Norwegian coast on Oddknuppen Island following a navigational error. The boat was interned by Norway, refloated on 28 March and towed to Mandal, later to Kristiansand-Marviken. After U-21 was recaptured by Germany in April 1940 it was transferred to Kiel and returned to service as training boat after being repaired.
U-21's position on 21 Mar 1940
Ships hit by U-21 on this date
General Events during this patrol
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Attacks on U-21 during this patrol
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* These are officers that later became commanders themselves.