Events on this day
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 date||1940: U-133 |
1942: U-771, U-853, U-1061
|1935: U-6 |
|1935: U-9 |
1941: U-376, U-455, U-584
|These are commissioned boats. For more see our Shipyard pages.|
Allied Ships hit on this date
|U-boat||Commander||Name of ship||Tons||Country||Convoy|
|U-506||Würdemann||City of Wellington||5,733||br|
|U-344||Pietsch||HMS Kite (U 87)||1,350||br||JW-59|
|U-480||Förster||HMCS 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]
No men died when this U-boat was lost. 50 men survived.
Survivors from U-boats almost always landed in allied captivity.
- 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.
The following men died on this day:
Wolfgang Heyda (1947).
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 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 Bergen, Norway: U-743
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-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-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.
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 757 entries that will appear in due course, so your suggestion may not appear immediately, but we are continuously updating the database.