Events on this day

21 August

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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 (0) Laid down (5) Launched (3) Commissioned (5)
No U-boat orders on this date1940: U-133
1942: U-771, U-853, U-1061
1944: U-3514
1935: U-6
1941: U-174
1943: U-1226
1935: U-9
1940: U-141
1941: U-376U-455U-584
These are commissioned boats. For more see our Shipyard pages.

Allied Ships hit on this date

 U-boatCommanderName of shipTonsCountryConvoy
 U-506WürdemannCity of Wellington 5,733   br
 U-596NonnLily 132   pl
 U-596NonnNamaz 50   ag
 U-596NonnPanikos 21   ag
 U-344PietschHMS Kite (U 87) 1,350   brJW-59
 U-480FörsterHMCS Alberni (K 103) 925   ca
* 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-134. The boat was attacked by Wildcat and Avenger aircraft from the escort carrier USS Croatan, escorting convoy UGS 14 in the Atlantic west of Portugal. The boat escaped unharmed. (Blair, vol 2, page 395)


U-963. A man was lost overboard during a crash dive at night (0017hrs) in the Bay of Biscay. [Bootsmaat Hans Reiter]

U-boats lost

No U-boats were lost on this date, 21 August.

- 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, 21 August.

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

Personnel Information

The following men were born on this day:
Hans-Joachim Brans (1915), Heinz Stein (1913).

The following men died on this day:
Wolfgang Heyda (1947), Kurt Hilbig (1951).

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 21 August

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 Lorient, France: U-60, U-65


From Lorient, France: U-141
From St. Nazaire, France: U-69, U-95

U-boats entering base:
To St. Nazaire, France: U-93 (41 days)


U-boats entering base:
To Brest, France: U-89 (77 days)
To Lorient, France: U-129 (94 days)
To Salamis, Greece: U-77 (37 days), U-559 (7 days)


From Konstanza, Rumania: U-18
From Lorient, France: U-505, U-515
From Narvik, Norway: U-625
From Toulon, France: U-371

U-boats entering base:
To Hammerfest, Norway: U-307 (37 days)
To Narvik, Norway: U-387 (50 days)


From Helsinki, Finland: U-717
From Horten, Norway: U-925
From La Pallice: U-714
From Narvik, Norway: U-354 (lost 4 days later), U-425, U-992
From Salamis, Greece: U-407
From Trondheim, Norway: U-312, U-743 (lost 2 days later)

U-boats entering base:
To Esplanade U-475 (6 days)
To Kristiansand U-871 (3 days)
To Königsberg U-481 (12 days)
To La Pallice U-766 (14 days), U-963 (9 days)

U-boats at sea on 21 August

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


U-28, U-29, U-33, U-34, U-37, U-38, U-39 (+), U-40, U-41, U-45, U-46, U-47, U-48, U-52.
14 boats at sea.


U-28, U-30, U-32, U-37, U-38, U-46, U-48, U-56, U-57 (+), U-60, U-100, U-101, U-124, UA.
14 boats at sea.


U-38, U-43, U-46, U-69, U-71, U-73, U-75, U-77, U-82, U-83, U-84, U-95, U-96, U-101, U-105, U-106, U-108, U-111 (+), U-123, U-124, U-125, U-126, U-129, U-141, U-143, U-145, U-201, U-202, U-204, U-205, U-206, U-451, U-452 (+), U-501 (+), U-552, U-553, U-557, U-559, U-561, U-563, U-564, U-567, U-568, U-569, U-571, U-751.
46 boats at sea.


U-66, U-68, U-69, U-73, U-86, U-91, U-92, U-94 (+), U-98, U-107, U-108, U-109, U-116, U-125, U-130, U-134, U-135, U-154, U-155, U-156, U-160, U-162 (+), U-163, U-164, U-165 (+), U-171 (+), U-172, U-173, U-174, U-175, U-176, U-179 (+), U-205, U-209, U-214, U-217, U-251, U-255, U-256, U-331, U-333, U-355, U-373, U-406, U-407, U-409, U-411, U-432, U-435, U-438, U-456, U-457, U-458, U-459, U-462, U-463, U-504, U-505, U-506, U-507, U-508, U-509, U-510, U-511, U-512 (+), U-513, U-514, U-515, U-516, U-517, U-553, U-558, U-564, U-565, U-566, U-569, U-572, U-590, U-594, U-596, U-598, U-600, U-601, U-604, U-605, U-608, U-609, U-653, U-654 (+), U-658, U-659, U-660, U-703, U-705 (+), U-752, U-755, U-756 (+).
97 boats at sea.


U-18, U-19, U-23, U-24, U-66, U-73, U-86, U-107, U-123, U-129, U-134 (+), U-161 (+), U-168, U-172, U-177, U-178, U-181, U-183, U-185 (+), U-188, U-196, U-198, U-230, U-255, U-257, U-262, U-269, U-302, U-333, U-340, U-354, U-355, U-358, U-360, U-371, U-380, U-382, U-406, U-407, U-410, U-415, U-431, U-445, U-458 (+), U-505, U-508, U-510, U-515, U-516, U-518, U-523 (+), U-532, U-533 (+), U-566, U-571, U-596, U-600, U-601, U-618, U-634 (+), U-636, U-639 (+), U-653, U-703, U-711, U-732, U-737, U-757, U-760, U-847 (+), U-956, U-960.
72 boats at sea.


U-20, U-23, U-92, U-170, U-180 (+), U-190, U-218, U-228, U-244, U-245, U-248, U-275, U-278, U-296, U-307, U-344 (+), U-354 (+), U-362 (+), U-363, U-365, U-370, U-394 (+), U-407, U-425, U-479, U-480, U-482, U-484 (+), U-516, U-518, U-530, U-539, U-541, U-546, U-548, U-596, U-667 (+), U-668, U-679, U-680, U-703, U-739, U-743 (+), U-764, U-772, U-802, U-804, U-855 (+), U-858, U-859 (+), U-861, U-862, U-863 (+), U-957, U-979, U-989, U-993, U-997, U-1062 (+), U-1221.
60 boats at sea.

General Events on 21 August


The Allies established a new troopship convoy route with the code letters UT for the build up to operation Overlord, the invasion of Normandy on D-Day, 6 June 1944. It was a fast and heavily escorted route averaging 15 knots.


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