Events on this day

23 October

Choose new date to check

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 (0) Laid down (1) Launched (2) Commissioned (3)
No U-boat orders on this date1944: U-25341941: U-216
1943: U-249
1941: U-593
1943: U-247U-317
These are commissioned boats. For more see our Shipyard pages.

Allied Ships hit on this date

 U-boatCommanderName of shipTonsCountryConvoy
 U-129WittReuben Tipton 6,829   am
 U-161AchillesHMS Phoebe (43) (d)5,450   br
 U-504PoskeCity of Johannesburg 5,669   br
 U-615KapitzkyEmpire Star 12,656   br
 U-621SchünemannEmpire Turnstone 6,113   brONS-136
 U-170PfefferCampos 4,663   bz
 U-23WahlenTanais 372   sj
* 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-190. While escorting convoy GUS 18 the American destroyer USS Turner (DD-648) engaged a surfaced U-boat ahead of the convoy with gunfire and dropped depth charges as it dived. U-190 escaped almost unharmed. (


U-1004. 09.18 hrs, inbound: U-1004 was attacked by aircraft off Bergen. No damage.

U-boats lost

1943: U-274 +

48 men died when this U-boat was lost. 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


A tragic event occurred in heavy weather. When the replacement watch opened the conning tower hatch they found that all four men of the previous watch had been lost overboard. [Oberleutnant zur See Werner Grüneberg, Fähnrich zur See Herbert von Bruchhausen, Oberbootsmannmaat Karl Heemann, Matrose Ewald Brühl]

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

Personnel Information

The following men were born on this day:
Günther Lorentz (1913), Günther Pfeffer (1914), Hans-Georg Friedrich Poske (1904), Siegfried Rothkirch und Panthen (1919).

The following men died on this day:
Ernst Hechler (1965), Günther Jordan (1943), Ralf Jürs (1972), Gerhard Peters (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 23 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 Kiel, Germany: U-56, U-58
From Wilhelmshaven, Germany: U-24


U-boats entering base:
To Lorient, France: U-47 (10 days), U-100 (12 days), U-123 (33 days)


U-boats entering base:
To Salamis, Greece: U-79 (26 days)


U-boats entering base:
To La Pallice U-333 (15 days)
To St. Nazaire, France: U-607 (46 days)


From Brest, France: U-228
From Kiel, Germany: U-391 (lost 52 days later), U-712
From Singapur: U-178
From St. Nazaire, France: U-358
From Toulon, France: U-565

U-boats entering base:
To Bordeaux, France: U-196 (225 days)
To Feodosia, Ukraine: U-9 (22 days)
To Harstad U-737 (20 days)
To La Pallice U-952 (48 days)
To Lorient, France: U-539 (40 days)
To Tromsö, Norway: U-354 (2 days)


From Farsund: U-714

U-boats entering base:
To Bergen, Norway: U-1004 (56 days)
To Flekkefjord U-294 (9 days), U-985 (55 days)
To Hammerfest, Norway: U-965 (9 days)
To Horten, Norway: U-806 (4 days)
To Kristiansand U-1009 (2 days), U-1061 (2 days)

U-boats at sea on 23 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-21, U-24, U-25, U-26, U-31, U-34, U-37, U-46, U-48, U-53, U-56, U-58, U-59.
14 boats at sea.


U-28, U-31 (+), U-38, U-46, U-48, U-65, U-93, U-101, U-124.
9 boats at sea.


U-38, U-66, U-68, U-71, U-73, U-74, U-75, U-77, U-82, U-83, U-84, U-85, U-93, U-97, U-101, U-103, U-106, U-107, U-109, U-123, U-125, U-126, U-129, U-133, U-202, U-203, U-206, U-208, U-371, U-374, U-432, U-502, U-558, U-563, U-564, U-568, U-569, U-571, U-573, U-576, U-577, U-751, UA.
43 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-98 (+), U-103, 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-224, U-258, U-260, U-301, U-332, U-356, U-377, U-381, U-382, U-383, U-402, U-409, U-410, U-413, 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-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-605 (+), U-606, U-608, U-610, U-613, 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-5.
112 boats at sea.


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-211 (+), U-212, U-214, U-218, U-219, U-220 (+), U-226 (+), U-228, U-231, U-256, U-260, U-262, U-267, U-271, U-275, U-280 (+), U-281, U-282 (+), U-306 (+), U-309, U-333, U-340 (+), U-343, U-355, U-358, U-360, U-371, U-373, U-387, U-391 (+), U-405 (+), U-413, U-424, U-426, U-437, U-441, U-448, U-450, U-453, U-455, U-466, U-488, U-505, U-516, U-518, U-530, U-532, U-536 (+), U-537, U-542 (+), U-552, U-565, U-566 (+), U-575, U-584 (+), U-586, U-592, U-603, U-608, U-642, U-648 (+), U-707 (+), U-709, U-713, U-714, U-731, U-732 (+), U-758, U-762, U-842 (+), U-843, U-848 (+), U-849 (+), U-953, U-956, U-963, U-966 (+), U-967, U-969.
95 boats at sea.


U-170, U-181, U-195, U-219, U-245, U-246, U-262, U-267, U-281, U-290, U-293, U-295, U-299, U-300, U-310, U-312, U-313, U-315, U-363, U-365, U-370, U-387, U-396, U-425, U-475, U-481, U-483, U-518, U-534, U-541, U-546, U-636, U-668, U-673 (+), U-676, U-714, U-722, U-737, U-771 (+), U-773, U-802, U-956, U-958, U-968, U-978, U-991, U-992, U-995, U-997, U-1001, U-1003, U-1060, U-1163, U-1165, U-1199, U-1200 (+), U-1221, U-1223, U-1226 (+), U-1227, U-1228, U-1230, U-1231.
63 boats at sea.

General Events on 23 October


U-196 completed the longest patrol by any submarine in WWII, 225 days from 13 March to 23 Oct, 1943, under the command of Krvkpt. Eitel-Friedrich Kentrat.


The former U-471 left port for the first time in the service of the French navy as Mille after repair.


Add more events! - If you know of an interesting event that happened on this day that's missing, or an upcoming event that you'd like to share, please contact us. We already have 782 entries that will appear in due course, so your suggestion may not appear immediately, but we are continuously updating the database.

Choose new date to check