1940

The target of the attack by the British destroyer HMS Hero on 10 April 1940 in position 62.54N, 01.56W, originally credited with sinking U-50, was almost certainly not a submarine. (1993-12-01, FDS/NHB)

U-2. 18.21 hrs, SW of Norway: a Wellington attacked the boat, dropping one bomb. No damage.

1944

U-843. An attack by an American B-24 bomber from Squadron VB 107 (pilot Edward W. Krug) damaged the stern torpedo tubes. The boat abandoned planned operations off Cape Town and continued to the Indian Ocean, arriving at Jakarta on 11 June. (Blair, vol 2, page 537)

U-821. 0304hrs, Bay of Biscay, inbound: Liberator Mk.V BZ781 (53 Sqn RAF/A, pilot F/O W.J. Irving, RCAF) made a Leigh Light attack after following a radar trace. The depth charges failed to release on the first run, and on a further two passes, possibly due to flak hits to the bomb bay on the second approach. The undamaged U-821 escaped further strafing attacks by diving after 20 minutes. The Liberator was left with an inoperable tail gun turret and damage to the hydraulics and nose wheel. The damage was noticed, and F/O Irving managed to reach base and land without flaps or brakes at first light - for which he later received the DFC. (Franks/Zimmerman)

157 men died when those 3 U-boats were lost on this date. 1 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.

There were no men lost from U-boats on this date, 10 April.

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

The following men were born on this day:
Hans-Joachim Gutteck (1914), Fritz Henning (1917), Friedrich Justi (1919), Heinrich Mäueler (1920), Egon Reiner Freiherr von Schlippenbach (1914), Fritz Schneewind (1917).

The following men died on this day:
Bernhard Emde (1996), Karl-Heinz Fuchs (1990), Gerhard Groth (1997), Karl-Ernst Kaiser (1944), Albert Lauzemis (1944), Herbert Nollau (1968), Jürgen Quaet-Faslem (1971), Johannes Rodig (1945), Albert Sürenhagen (1945).

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

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.

1940

U-boats entering base:
To Wilhelmshaven, Germany: U-23 (2 days), U-24 (2 days)

1941

Sailed:
From Kiel, Germany: U-75
From Lorient, France: U-123

U-boats entering base:
To St. Nazaire, France: U-46 (27 days), U-97 (22 days)

1942

U-boats entering base:
To La Pallice U-332 (53 days)
To Lorient, France: U-124 (49 days)

1943

Sailed:
From Feodosia, Ukraine: U-24
From Kiel, Germany: U-650
From La Spezia, Italy: U-97
From Lorient, France: U-175 (lost 8 days later), U-226

U-boats entering base:
To St. Nazaire, France: U-666 (45 days)

1944

Sailed:
From Konstanza, Rumania: U-19
From Ramsund, Norway: U-1060

U-boats entering base:
To La Pallice U-212 (3 days), U-309 (3 days)
To Narvik, Norway: U-315 (19 days)

1945

Sailed:
From Narvik, Norway: U-278

U-boats entering base:
To Kristiansand U-868 (28 days)

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

1940

U-2, U-4, U-5, U-6, U-7, U-9, U-10, U-13, U-14, U-19, U-25, U-30, U-34, U-37, U-38, U-46, U-47, U-48, U-49 (+), U-51, U-52, U-56, U-57, U-58, U-59, U-60, U-62, U-64 (+), U-65.
29 boats at sea.

1941

U-38, U-52, U-69, U-73, U-74, U-75, U-94, U-98, U-101, U-103, U-105, U-106, U-107, U-108, U-123, U-124, U-552.
17 boats at sea.

1942

U-66, U-68, U-71, U-81, U-83, U-84, U-85 (+), U-86, U-97, U-98, U-105, U-108, U-109, U-123, U-125, U-130, U-136, U-154, U-160, U-162, U-201, U-202, U-203, U-209, U-252 (+), U-331, U-333, U-334, U-352 (+), U-373, U-376, U-377, U-378, U-402, U-403, U-406, U-431, U-435, U-436, U-437, U-453, U-454, U-456, U-459, U-505, U-506, U-507, U-552, U-561, U-562, U-564, U-566, U-571, U-572, U-575, U-576, U-582, U-589, U-590, U-591, U-592, U-654, U-657, U-752, U-754, UA.
66 boats at sea.

1943

U-24, U-67, U-68, U-71, U-84, U-86, U-97, U-105 (+), U-108, U-117, U-123, U-126 (+), U-128 (+), U-129, U-134, U-154, U-155, U-159, U-160, U-161, U-168, U-172, U-174 (+), U-175 (+), U-176 (+), U-177, U-178, U-180, U-181, U-182 (+), U-183, U-185, U-188, U-189 (+), U-191 (+), U-195, U-196, U-197 (+), U-198, U-203 (+), U-209 (+), U-226, U-229, U-251, U-255, U-257, U-258 (+), U-260, U-262, U-264, U-267, U-269, U-270, U-302, U-303, U-305, U-306, U-333, U-336, U-355, U-371, U-373, U-375, U-381 (+), U-382, U-404, U-409, U-413, U-414, U-415, U-438 (+), U-440, U-441, U-453, U-455, U-462, U-463, U-465, U-467, U-487, U-506, U-509, U-510, U-513, U-515, U-516, U-518, U-523, U-526 (+), U-527, U-530, U-532, U-552, U-563, U-564, U-565, U-571, U-572, U-584, U-586, U-590, U-592, U-593, U-594, U-596, U-598, U-602 (+), U-610, U-613, U-615, U-617, U-618, U-625, U-628, U-629, U-630 (+), U-631, U-639, U-641, U-646, U-648, U-662, U-706, U-711, U-732, U-755, U-954 (+).
127 boats at sea.

1944

U-18, U-19, U-23, U-66 (+), U-92, U-123, U-129, U-154, U-155, U-170, U-178, U-181, U-188, U-190, U-196, U-214, U-218, U-255, U-262, U-267, U-311 (+), U-312, U-313, U-333, U-342 (+), U-354, U-361, U-362, U-365, U-385, U-448 (+), U-471, U-473, U-488 (+), U-505, U-518, U-532, U-537, U-541, U-543 (+), U-546, U-548, U-550 (+), U-552, U-565, U-596, U-621, U-636, U-667, U-672, U-703, U-716, U-736, U-739, U-740, U-741, U-765 (+), U-766, U-802, U-821, U-843, U-852 (+), U-859 (+), U-969, U-970, U-993, U-1060, U-1061, U-1062.
69 boats at sea.

1945

U-190, U-218, U-245, U-249, U-278, U-285 (+), U-293, U-294, U-299, U-315, U-325 (+), U-326 (+), U-396 (+), U-427, U-481, U-485, U-486 (+), U-510, U-516, U-518 (+), U-530, U-532, U-541, U-546 (+), U-548 (+), U-636 (+), U-637, U-668, U-739, U-773, U-776, U-805, U-825, U-826, U-853 (+), U-857 (+), U-858, U-861, U-873, U-879 (+), U-880 (+), U-881 (+), U-889, U-956, U-978, U-979 (+), U-1009, U-1023, U-1024 (+), U-1055 (+), U-1063 (+), U-1107 (+), U-1202, U-1206 (+), U-1235 (+), U-1274 (+), U-1305, U-2321, U-2322, U-2324.
60 boats at sea.

1945

The following U.P. report was released to the newswires: Roars like the detonation of depth charges shook houses on the Kent and Sussex coast last night, leading channel coast dwellers to believe that a battle against U-boat was in progress. Heavy rolls of gunfire also came from the direction of Dunkirk.

The following A.P. report was released to the newswires: A Coast Guard Lieutenant said today that a United States cruiser on which President Roosevelt was returning from Yalta sailed almost directly over a German submarine in the Strait of Gibraltar. Lieutenant John F. Pival, of Detroit, told this story: "We were entering the Mediterranean, and knew that a U-boat was in the vicinity. About twenty bombers were criss-crossing the area while a lot of destroyers and anti-submarine ships were combing the area. "Our radio was tuned to the aircraft frequency and just as we started into the narrows a British pilot was heart do say, 'I see the beggar. Yes, that's him. He's diving. Here I go.' "However, the plane did not succeed in getting the submarine. "Just then one of our finest cruisers and her escort came steaming out of the Mediterranean, almost directly over where the submarine had been. "Upon arrival in Italy, we were startled to hear that the President was aboard the cruiser."

U-668 evacuated a weather team from Bear Island.

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