U-boat patrols

Patrol info for U-103

DepartureArrival / FateDuration
24 Apr 1943Lorient26 May 1943Lorient33 days


Officers *

Kptlt. Gustav-Adolf Janssen

Oblt. Wilhelm Brauel

Ltn. Otto Wermuth

Daily positions, sinkings and allied attacks during the patrol of U-103

We have daily positions for all 33 days on this patrol.

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

General Events during this patrol


18 May 1943. U-103 rescued two survivors from Fort Concord, sunk one week previously by U-456.

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Attacks on U-103 during this patrol

27 Apr 1943
00.05 hrs, Bay of Biscay, outbound: Wellington bomber M for Mother from 172 Sqn RAF located U-103 on radar and made a Leigh Light attack, but the boat was warned by the radar detector, and dived in time to evade six depth charges which exploded harmlessly ahead of her. The Wellington circled the area and then approached a second radar contact which proved to be U-566, left unable to dive by an earlier air attack. The aircraft had no depth charges left and returned to base after an exchange of gunfire. (Sources: KTBs/ADM 199-1784)

22 May 1943
14.48 hrs, Bay of Biscay NW of Finisterre, inbound: British Whitley bomber Z9440 (RAF OTU 10/N, pilot F/S D.W. Brookes) was prevented from dropping depth charges by heavy and accurate flak on its initial approach. U-103 dived and escaped unscathed. Damage to the Whitley (misidentified as a Halifax) was slight, and it reached base and landed without incident. (Sources: Franks/Zimmerman)

About this data
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* These are officers that later became commanders themselves.

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