U-boat patrols

Patrol info for U-403

DepartureArrival / FateDuration
19 Apr 1943Brest31 May 1943Brest43 days


Officers *

Kptlt. Heinz-Ehlert Clausen

Oblt. Ernst-Günther Unterhorst

Daily positions, sinkings and allied attacks during the patrol of U-403

We have daily positions for all 43 days on this patrol.

Wolfpack operations during this patrol

U-403 operated with the following Wolfpacks during this patrol
   Amsel (26 Apr 1943 - 3 May 1943)
   Amsel 4 (3 May 1943 - 6 May 1943)
   Rhein (7 May 1943 - 10 May 1943)

Ships hit by U-403 during this patrol

General Events during this patrol


10 May 1943. The boat had a gunnery duel with the Dutch merchant ship Dexterous.

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Attacks on U-403 during this patrol

10 May 1943
18.41 hrs, mid Atlantic: a British Swordfish aircraft (FAA Sqdn 811/M) from HMS Biter (D 97), escorting convoy HX 237 strafed U-403 and dropped two bombs. No damage. (Sources: Rohwer)

About this data
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See all patrols for U-403

* These are officers that later became commanders themselves.

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