Patrol info for U-107
| Departure | Arrival / Fate | Duration | ||
| 29 Mar 1941 | Lorient | 2 Jul 1941 | Lorient | 96 days |
Commander | Officers * |
 Kptlt. Günter Hessler |
1WO Oblt. Helmut Witte |
Daily positions, sinkings and allied attacks during the patrol of U-107
Legend
means a ship hit (sunk or damaged).
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We have 91 daily positions for the 96 days U-107 was at sea.
Departure from Lorient on 29 Mar 1941.
30 Mar 1941 - 31 Mar 1941 - 1 Apr 1941 - 2 Apr 1941 - 3 Apr 1941 - 4 Apr 1941 - 5 Apr 1941 - 6 Apr 1941 - 7 Apr 1941 - 8 Apr 1941 - 9 Apr 1941 - 10 Apr 1941 - 11 Apr 1941 - 12 Apr 1941 - 13 Apr 1941 - 14 Apr 1941 - 15 Apr 1941 - 16 Apr 1941 - 17 Apr 1941 - 18 Apr 1941 - 19 Apr 1941 - 20 Apr 1941 - 21 Apr 1941 - 22 Apr 1941 - 23 Apr 1941 - 24 Apr 1941 - 25 Apr 1941 - 26 Apr 1941 - 27 Apr 1941 - 28 Apr 1941 - 29 Apr 1941 - 30 Apr 1941 - 1 May 1941 - 2 May 1941 - 3 May 1941 - 4 May 1941 - 5 May 1941 - 6 May 1941 - 7 May 1941 - 8 May 1941 - 9 May 1941 - 10 May 1941 - 11 May 1941 - 12 May 1941 - 13 May 1941 - 14 May 1941 - 15 May 1941 - 16 May 1941 - 17 May 1941 - 18 May 1941 - 19 May 1941 - 20 May 1941 - 21 May 1941 - 22 May 1941 - 23 May 1941 - 24 May 1941 - 25 May 1941 - 26 May 1941 - 27 May 1941 - 28 May 1941 - 29 May 1941 - 30 May 1941 - 31 May 1941 - 1 Jun 1941 - 2 Jun 1941 - 3 Jun 1941 - 4 Jun 1941 - 5 Jun 1941 - 6 Jun 1941 - 7 Jun 1941 - 8 Jun 1941 - 9 Jun 1941 - 10 Jun 1941 - 11 Jun 1941 - 12 Jun 1941 - 13 Jun 1941 - 14 Jun 1941 - 15 Jun 1941 - 16 Jun 1941 - 17 Jun 1941 - 18 Jun 1941 - 19 Jun 1941 - 20 Jun 1941 - 21 Jun 1941 - 22 Jun 1941 - 23 Jun 1941 - 24 Jun 1941 - 25 Jun 1941 - 26 Jun 1941 - 27 Jun 1941 - 28 Jun 1941 - 29 Jun 1941 - 30 Jun 1941 - 1 Jul 1941 -
Arrival at Lorient on 2 Jul 1941.
Ships hit by U-107 during this patrol
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | ||
|---|---|---|---|---|---|---|---|---|
| 8 Apr 1941 | U-107 | Günter Hessler |  | Eskdene | 3,829 |  | br | OG-57 |
| 8 Apr 1941 | U-107 | Günter Hessler | Helena Margareta | 3,316 | | br | OG-57 | |
| 9 Apr 1941 | U-107 | Günter Hessler | Harpathian | 4,671 | | br | OG-57 | |
| 9 Apr 1941 | U-107 | Günter Hessler | | Duffield | 8,516 | | br | |
| 21 Apr 1941 | U-107 | Günter Hessler | | Calchas | 10,305 | | br | |
| 30 Apr 1941 | U-107 | Günter Hessler | | Lassell | 7,417 | | br | OB-309 |
| 17 May 1941 | U-107 | Günter Hessler | | Marisa | 8,029 |  | nl | |
| 18 May 1941 | U-107 | Günter Hessler | | Piako | 8,286 | | br | |
| 27 May 1941 | U-107 | Günter Hessler | | Colonial | 5,108 | | br | OB-318 |
| 28 May 1941 | U-107 | Günter Hessler | | Papalemos | 3,748 |  | gr | |
| 31 May 1941 | U-107 | Günter Hessler | Sire | 5,664 | | br | OB-320 | |
| 1 Jun 1941 | U-107 | Günter Hessler | | Alfred Jones | 5,013 | | br | OB-320 |
| 8 Jun 1941 | U-107 | Günter Hessler | | Adda | 7,816 | | br | OB-323 |
| 13 Jun 1941 | U-107 | Günter Hessler | | Pandias | 4,981 | | gr | |
| 86,699 | ||||||||
14 ships sunk (86,699 tons). Legend | ||||||||
General Events during this patrol
1941
29 Mar 1941. U-107 under Kptlt. Günther Hessler put out from Lorient, France at 19:30 on 29 March, 1941 for what would become the most successful patrol of the entire war against allied merchant shipping. She left the base along with U-94 commanded by Kptlt. Kuppisch but then U-107 headed southwards. Her operational area was around the Canary Islands and nearby Freetown where she sank 14 ships for a total of 86,699 tons. On 3 and 4 of May U-107 refuelled from the German support ship Nordmark. There they also met U-105. Five days later they took on board 14 torpedoes and some food, fuel and water from the support ship Egerland. The boat returned to Lorient on 2 July 1941. Kptlt. Hessler married Karl Dönitz's daughter, Ursula, in November 1937. At that time Hessler was serving on the torpedo boats but in April 1940 he joined the U-boat force. Because Hessler was his son-in-law Dönitz had trouble giving Hessler his deserved Knights Cross and eventually Grand Admiral Raeder signed the papers.
9 May 1941. U-107 was supported by the German support ship Egerland with 14 torpedoes and some food. The Egerland was camouflaged as an American ship. This is one reason for some rumors after the war that American ships supported U-boats.
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Attacks on U-107 during this patrol
We have no recorded attacks on U-107 during this patrol.
If you believe we have omitted an attack on U-107 please let us know.
See all patrols for U-107
* These are officers that later became commanders themselves.
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