Events on this day

20 October

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This is a run-down from several databases on our site. It's meant to give a clear picture of events on this date, all year round.

U-boat Shipyard report

Ordered (6) Laid down (2) Launched (2) Commissioned (4)
1939: U-507, U-508, U-509, U-510, U-511, U-5121941: U-734
1943: U-1109
1943: U-872
1944: U-3011
1941: U-508
1942: U-191
1943: U-295U-1224
These are commissioned boats. For more see our Shipyard pages.

Allied Ships hit on this date

 U-boatCommanderName of shipTonsCountryConvoy
 U-34RollmannGustaf Adolf 926   sw
 U-34RollmannSea Venture 2,327   br
 U-100SchepkeCaprella 8,230   brHX-79
 U-100SchepkeLoch Lomond 5,452   brHX-79
 U-100SchepkeSitala 6,218   brHX-79
 U-124SchulzCubano 5,810   nwOB-229
 U-124SchulzSulaco 5,389   brOB-229
 U-46EndrassJanus 9,965   swHX-79
 U-47PrienAthelmonarch (d)8,995   brHX-79
 U-47PrienLa Estancia 5,185   brHX-79
 U-47PrienWhitford Point 5,026   brHX-79
 U-48BleichrodtShirak 6,023   brHX-79
 U-126BauerBritish Mariner total loss6,996   br
 U-77HartmannMahrous 18   sy
 U-532JunkerBritish Purpose (d)5,845   brBM-71
* Unless otherwise noted the ships listed here were sunk. (d) = damaged

See all Allied ships hit by U-boats during WWII.

Attacks on this day


U-31. A British submarine fired torpedoes at U-31 off Lorient, but without success.

U-boats lost

1942: U-216 +
1943: U-378 +, U-420 +

142 men died when those 3 U-boats were lost on this date. There were no survivors.
U-boats marked with + were lost with all hands.

- For more information on U-boat losses check out our Fates section.

U-boat Men Lost or Wounded

There were no men lost from U-boats on this date, 20 October.

- For more information on Men lost from U-boats check out this page.

Personnel Information

The following men were born on this day:
Ludo Kregelin (1919), Hermann Lessing (1900), Hans-Jürgen Schley (1920), Klaus Weber (1922).

The following men died on this day:
Uwe Christiansen (2007), Erich Mäder (1943), Hans-Jürgen Reese (1943), Karl-Otto Schultz (1942), Herbert Uhlig (1997).

See the entire U-boat commander listing showing all U-boat commanders.
We might include more officers (Allied and Axis) at a later date.

U-boat departures and arrivals on 20 October

This section shows the U-boat departures and arrivals from bases on this day of the year. Current country names shown with harbour names. Boats entering port display days at sea during that patrol.


From Wilhelmshaven, Germany: U-47

U-boats entering base:
To Kiel, Germany: U-19 (2 days)


U-boats entering base:
To Kiel, Germany: U-59 (4 days)


From Kiel, Germany: U-577

U-boats entering base:
To Salamis, Greece: U-559 (31 days)


From Kiel, Germany: U-664
From La Spezia, Italy: U-73
From Pola: U-205
From St. Nazaire, France: U-608

U-boats entering base:
To Skjomenfjord U-354 (4 days)


From Sevastopol: U-24


From Kiel, Germany: U-806

U-boats entering base:
To Danzig, Germany: U-745 (40 days)
To Farsund U-714 (55 days)

U-boats at sea on 20 October

Boats entering port on this day are not counted, but boats departing for patrol are. (+) indicates the boat was lost during this patrol.


U-16 (+), U-25, U-34, U-37, U-46, U-48.
6 boats at sea.


U-28, U-31 (+), U-37, U-38, U-46, U-47, U-48, U-65, U-93, U-99, U-100, U-101, U-123, U-124.
14 boats at sea.


U-38, U-66, U-68, U-71, U-73, U-75, U-77, U-79, U-82, U-83, U-84, U-85, U-93, U-97, U-101, U-103, U-107, U-108, U-109, U-123, U-125, U-126, U-132, U-202, U-203, U-206, U-208, U-371, U-374, U-432, U-502, U-553, U-558, U-563, U-564, U-568, U-569, U-573, U-576, U-577, U-751.
41 boats at sea.


U-43, U-67, U-68, U-69, U-71, U-73, U-77, U-81, U-84, U-87, U-89, U-106, U-107, U-117, U-125, U-126, U-128, U-129, U-132 (+), U-134, U-154, U-156, U-159, U-160, U-161, U-163, U-172, U-174, U-177, U-178, U-181, U-183, U-201, U-202, U-203, U-205, U-212, U-221, U-224, U-254, U-258, U-260, U-301, U-332, U-333, U-356, U-377, U-381, U-382, U-383, U-402, U-409, U-410, U-412 (+), U-431, U-436, U-437, U-438, U-440, U-441, U-442, U-443, U-454, U-455, U-459, U-462, U-463, U-504, U-505, U-506, U-508, U-509, U-510, U-513, U-514, U-516, U-518, U-519, U-520 (+), U-521, U-522, U-552, U-559 (+), U-563, U-571, U-572, U-575, U-586, U-590, U-599 (+), U-602, U-604, U-606, U-607, U-608, U-609, U-610, U-615, U-618, U-620, U-621, U-622, U-624, U-627 (+), U-658 (+), U-659, U-662, U-664, U-704, U-706, U-752, U-753, U-757, UD-3, UD-5.
115 boats at sea.


U-9, U-23, U-24, U-68, U-73, U-91, U-103, U-123, U-129, U-154, U-155, U-168, U-170, U-183, U-188, U-190, U-193, U-196, U-211 (+), U-212, U-214, U-218, U-220 (+), U-226 (+), U-231, U-256, U-260, U-262, U-267, U-271, U-274 (+), U-275, U-280 (+), U-281, U-282 (+), U-305, U-306 (+), U-309, U-340 (+), U-355, U-360, U-371, U-373, U-405 (+), U-413, U-426, U-431 (+), U-437, U-441, U-448, U-450, U-455, U-466, U-488, U-505, U-516, U-518, U-530, U-532, U-536 (+), U-537, U-539, U-552, U-566 (+), U-575, U-584 (+), U-586, U-592, U-603, U-608, U-642, U-645, U-648 (+), U-707 (+), U-709, U-713, U-714, U-731, U-732 (+), U-737, U-758, U-762, U-842 (+), U-843, U-848 (+), U-849 (+), U-952, U-953, U-956, U-963, U-966 (+), U-967, U-969.
93 boats at sea.


U-155, U-170, U-181, U-195, U-219, U-245, U-246, U-262, U-267, U-281, U-290, U-293, U-294, U-295, U-299, U-300, U-309, U-310, U-312, U-313, U-315, U-363, U-365, U-370, U-387, U-425, U-475, U-481, U-483, U-518, U-534, U-541, U-546, U-636, U-668, U-676, U-722, U-737, U-771 (+), U-773, U-802, U-956, U-958, U-968, U-978, U-985, U-991, U-992, U-995, U-997, U-1001, U-1003, U-1004, U-1163, U-1165, U-1199, U-1200 (+), U-1221, U-1223, U-1226 (+), U-1227, U-1228, U-1230, U-1231.
64 boats at sea.

General Events on 20 October


After sinking the steamer Gustav Adolf, U-34 towed the ship's lifeboats for three hours until a Norwegian ship came in sight and could rescue the survivors.


U-662 rendezvoused with the milch cow U-463 to get treatment for one of the crew suffering severe bleeding of the stomach. Stormy weather made a transfer between boats impossible, and two days passed before the doctor could see his patient.


U-415 returned to base due to serious engine trouble.


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