Patrol info for U-103
| Departure | Arrival / Fate | Duration | ||
| 24 Apr 1943 | Lorient | 26 May 1943 | Lorient | 33 days |
Commander | Officers * | |
 Kptlt. Gustav-Adolf Janssen |
1WO Ltn. Otto Wermuth |
1WO Oblt. Wilhelm Brauel |
Daily positions, sinkings and allied attacks during the patrol of U-103
Legend
indicates an Allied attack on the boat.
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We have daily positions for all 33 days on this patrol.
Departure from Lorient on 24 Apr 1943.
25 Apr 1943 - 26 Apr 1943 - 27 Apr 1943 - 28 Apr 1943 - 29 Apr 1943 - 30 Apr 1943 - 1 May 1943 - 2 May 1943 - 3 May 1943 - 4 May 1943 - 5 May 1943 - 6 May 1943 - 7 May 1943 - 8 May 1943 - 9 May 1943 - 10 May 1943 - 11 May 1943 - 12 May 1943 - 13 May 1943 - 14 May 1943 - 15 May 1943 - 16 May 1943 - 17 May 1943 - 18 May 1943 - 19 May 1943 - 20 May 1943 - 21 May 1943 - 22 May 1943 - 23 May 1943 - 24 May 1943 - 25 May 1943 -
Arrival at Lorient on 26 May 1943.
Wolfpack operations during this patrol
U-103 operated with the following Wolfpacks during this patrol
Amsel 4 (4 May 1943 - 6 May 1943)
Rhein (7 May 1943 - 10 May 1943)
Elbe 2 (10 May 1943 - 14 May 1943)
Ships hit by U-103 during this patrol
No entries found.
General Events during this patrol
1943
18 May 1943. U-103 rescued two shipwrecked survivors of the Fort Concord, which had been sunk by U-456 one week ago.
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Attacks on U-103 during this patrol
27 Apr 1943
At 00.05 hours, the outbound boat was attacked by a Leigh Light equipped Wellington aircraft (172 Sqn RAF/M) after being located by radar in the Bay of Biscay. Warned by the radar detector, U-103 evaded the attack and escaped by diving. No damage were caused by the six depth charges that had missed ahead. The aircraft circled the area and homed on a second radar contact, that proved to be U-566 which was unable to dive due to an earlier air attack. The aircraft had no depth charges left and returned to base after exchanging gunfire. (Sources: KTBs/ADM 199-1784)
22 May 1943
At 14.48 hours, the inbound boat was attacked by the British Whitley aircraft Z9440 (10 OTU RAF/N, pilot F/S D.W. Brookes) northwest of Cape Finisterre in the Bay of Biscay. AA fire hit the aircraft (misidentified as Halifax) during the first attack run and prevented the crew from dropping their depth charges. U-103 crash-dived and the only slightly damaged Whitley returned safely to base. (Sources: Franks/Zimmerman)
About this data
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* These are officers that later became commanders themselves.
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