| Operations information for U-621 |
29.09.1942 - 05.11.1942
First Sailing - active patrol
U-621 left Kiel under the command of Horst Schünemann on 29th Sep 1942 and arrived at return on 5th Nov 1942 after over five weeks.
Horst Schünemann hit one ship on this patrol from convoy ONS-136.-
On 23rd Oct 1942 he sank the British 6,113 ton Empire Turnstone, sailing with convoy ONS-136.
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05.12.1942 - 05.01.1943
Second Sailing - active patrol
On the 5th Dec 1942, U-621 left Brest under the command of Max Kruschka and after four and a half weeks arrived at return on 5th Jan 1943.
Max Kruschka hit two ships on this patrol, one was from convoy ONS-152.-
On 18th Dec 1942 he sank the Greek 4,474 ton Oropos, a member of convoy ONS-152.
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On 20th Dec 1942 he sank the British 6,217 ton Otina.
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01.02.1943 - 23.03.1943
Third Sailing - active patrol
U-621 departed under Max Kruschka from Brest on 1st Feb 1943 and arrived at return on 23rd Mar 1943 after just over seven weeks.
At 2145 HRS on 24th Feb 1943 in square BC 91, U-621 came under attack from an aircraft of RCAF 5 Squadron. U-621 was only slightly damaged in the attack.
At 0915 HRS on 21st Mar 1943 in square BF 48, U-621 came under attack from an aircraft of RAF 311 Squadron. U-621 was not damaged by the attack.
At 1902 HRS on 21st Mar 1943 in square BF 47, U-621 came under attack from an aircraft of RAF 311 Squadron. U-621 was not damaged by the attack.
Max Kruschka hit one ship on this patrol from convoy ONS-169.-
On 11th Mar 1943 he sank the British 3,355 ton Baron Kinnaird, part of convoy ONS-169.
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22.04.1943 - 03.06.1943
Fourth Sailing - active patrol
U-621 left Brest under the command of Max Kruschka on 22nd Apr 1943 and after six weeks arrived at return on 3rd Jun 1943.
At 1842 HRS on 31st May 1943 in square BF 44, U-621 came under attack from an aircraft of RAF 224 Squadron. U-621 was moderately damaged by the attack. The boat defended itself with flak without destroying the aircraft.
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22.08.1943 - 28.09.1943
Fifth Sailing - active patrol
On the 22nd Aug 1943, U-621 left Brest under the command of Max Kruschka and arrived at return on 28th Sep 1943 after over five weeks.
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06.01.1944 - 23.01.1944
Sixth Sailing - active patrol
U-621 departed under Max Kruschka from Brest on 6th Jan 1944 and after two and a half weeks arrived at return on 23rd Jan 1944.
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21.02.1944 - 19.04.1944
Seventh Sailing - active patrol
U-621 left Brest under the command of Max Kruschka on 21st Feb 1944 and arrived at return on 19th Apr 1944 after over eight weeks.
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06.06.1944 - 23.06.1944
Eighth Sailing - active patrol
On the 6th Jun 1944, U-621 left Brest under the command of Hermann Stuckmann and after two and a half weeks arrived at return on 23rd Jun 1944.
Hermann Stuckmann hit one ship on this patrol.-
On 15th Jun 1944 he damaged the American 1,625 ton USS LST-280.
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15.07.1944 - 11.08.1944
Ninth Sailing - active patrol
U-621 departed under Hermann Stuckmann from Brest on 15th Jul 1944 and arrived at return on 11th Aug 1944 after nearly four weeks.
Hermann Stuckmann hit two ships on this patrol.-
On 29th Jul 1944 he sank the British 2,938 ton HMS Prince Leopold.
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On 30th Jul 1944 he damaged the British 10,048 ton Ascanius.
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13.08.1944 - 18.08.1944
Tenth Sailing
U-621 left Brest under the command of Hermann Stuckmann on 13th Aug 1944 and after five days arrived at return on 18th Aug 1944.
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