Events on this day

21 December

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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 (7) Launched (5) Commissioned (5)
No U-boat orders on this date1937: U-42
1939: U-71
1940: U-173, U-255
1942: U-682, U-722
1944: U-3044
1935: U-19
1938: U-52
1940: U-651
1942: U-343
1943: U-874
1939: U-62
1942: U-277, U-487
1944: U-1405, U-3011
These are commissioned boats. For more see our Shipyard pages.

Allied Ships hit on this date

 U-boatCommanderName of shipTonsCountryConvoy
 U-21FrauenheimCarl Henckel 1,352   sw
 U-21 [Mine]FrauenheimHMS Bayonet (Z 05) 605   br
 U-21FrauenheimMars 1,475   sw
 U-46SohlerRudolf 924   nw
 U-65StockhausenCharles Pratt 8,982   pa
 U-567EndrassAnnavore 3,324   nwHG-76
 U-573HeinsohnHellen 5,289   nw
 U-751BigalkHMS Audacity (D 10) 11,000   brHG-76
 U-562HammStrathallan 23,722   brKMF-5
 U-591ZetzscheMontreal City 3,066   brON-152
 U-806HornbostelSamtucky (d)7,219   brHX-327
 U-995HessReshitel’nyj 20   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-1062. Aircraft attack, aircraft shot down:
Canadian Beaufighter LZ452 (RCAF Sqdn 404/H, pilot F/O I. Gillespie, RCAF)
Canadian Beaufighter NE323 (RCAF Sqdn 404/F, pilot F/L R. Munro, RCAF)

11.30 hrs, south of Egersund, Norway: the boat was attacked by eight Beaufighters while en route to Bergen escorted by the German minesweeper M-403. Four Beaufighters of 144 Sqdn RAF carried torpedoes and four from 404 Sqdn RCAF acted as flak suppressors. U-1062 was slightly damaged by strafing but the torpedoes missed. Flak from both vessels brought down two Beaufighters, killing all four aircrew.


U-boats lost

1941: U-451 , U-567 +
1943: U-284

91 men died when those 3 U-boats were lost on this date. 50 men survived.

Survivors from U-boats almost always landed in allied captivity.
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, 21 December.

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

Personnel Information

The following men were born on this day:
Ewald Hülsenbeck (1919), Rolf Manke (1915), Renko Tammen (1922).

The following men died on this day:
Kurt Dobratz (1996), Engelbert Endrass (1941), Dieter Erdmann (1996), Eberhard Hoffmann (1941), Helmut Köster (1941).

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 December

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 Brest, France: U-84
From La Pallice: U-571
From Messina, Italy: U-77
From Salamis, Greece: U-79 (lost 3 days later)


From Bergen, Norway: U-167
From La Spezia, Italy: U-617
From Lorient, France: UD-5
From St. Nazaire, France: U-404

U-boats entering base:
To La Spezia, Italy: U-602 (21 days)
To Lorient, France: U-67 (97 days)
To Pola U-81 (28 days)
To St. Nazaire, France: U-465 (36 days)


U-boats entering base:
To Trondheim, Norway: U-314 (8 days)


From Bogenbucht: U-318
From Kiel, Germany: U-735, U-1235

U-boats entering base:
To Bergen, Norway: U-775 (34 days), U-1233 (5 days)

U-boats at sea on 21 December

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


U-21, U-22, U-46.
3 boats at sea.


U-37, U-38, U-52, U-65, U-94, U-95, U-96, U-100, U-124.
9 boats at sea.


U-67, U-68, U-71, U-74, U-77, U-79 (+), U-83, U-84, U-86, U-107, U-108, U-124, U-125, U-128, U-129, U-133, U-202, U-371, U-374 (+), U-375, U-432, U-502, U-559, U-562, U-565, U-566, U-568, U-569, U-571, U-573, U-576, U-577, U-581, U-652, U-653, U-654, U-751, UA.
38 boats at sea.


U-9, U-86, U-91, U-92, U-103, U-105, U-106, U-109, U-123, U-124, U-125, U-126, U-128, U-129, U-130, U-134, U-135, U-154, U-155, U-159, U-161, U-163, U-164 (+), U-167, U-172, U-174, U-175, U-176, U-177, U-178, U-181, U-182 (+), U-183, U-185, U-203, U-211, U-212, U-214, U-217, U-221, U-225, U-260, U-333, U-336, U-354, U-356 (+), U-357 (+), U-371, U-373, U-375, U-380, U-381, U-384, U-404, U-406, U-409, U-410, U-432, U-435, U-436, U-439, U-440, U-441, U-442 (+), U-443, U-444, U-445, U-455, U-459, U-461, U-463, U-506, U-507 (+), U-508, U-514, U-515, U-519, U-524, U-525, U-562, U-563, U-564, U-565, U-569, U-575, U-591, U-593, U-600, U-604, U-609, U-610, U-615, U-617, U-618, U-620 (+), U-621, U-623, U-628, U-631, U-653, U-657, U-659, U-662, U-663, U-664, U-706, U-757, U-758, UD-3.
109 boats at sea.


U-9, U-23, U-68, U-92, U-103, U-107, U-129, U-155, U-170, U-178, U-190, U-193, U-219, U-260, U-270, U-275, U-277, U-302, U-305 (+), U-309, U-311, U-354, U-364 (+), U-377 (+), U-380, U-382, U-387, U-390, U-392, U-406, U-415, U-421, U-445, U-471, U-510, U-515, U-516, U-530, U-541, U-543, U-544 (+), U-545 (+), U-565, U-596, U-601, U-618, U-625, U-629, U-636, U-641, U-645 (+), U-653, U-667, U-672, U-716, U-731, U-734, U-741, U-744, U-758, U-761, U-763, U-801, U-846, U-952, U-957, U-960, U-962, U-972, U-976, U-981, U-1060, U-1062.
73 boats at sea.


U-181, U-195, U-244, U-248 (+), U-285, U-286, U-296, U-299, U-312, U-322 (+), U-325, U-427, U-481, U-485, U-486, U-637, U-650 (+), U-679, U-680, U-722, U-773, U-806, U-843, U-862, U-869 (+), U-870, U-877 (+), U-905, U-956, U-979, U-991, U-995, U-997, U-1009, U-1053, U-1055, U-1202, U-1223, U-1227, U-1228, U-1230, U-1231, U-1232.
43 boats at sea.

General Events on 21 December


U-284 was scuttled after suffering major damage from floating ice in mid Atlantic; her sister boat, U-629 rescued the entire crew and brought them back to base at Brest on 5 January 1944.


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