List of all U-boats

U-121

Type

IIB

Ordered

28 Sep 1937

Laid down

16 Apr 1938

Flender Werke AG, Lübeck (werk 269)

Launched

20 Apr 1940

Commissioned

28 May 1940

Kptlt. Karl-Ernst Schroeter

Commanders

28 May 1940	-	30 Mar 1941	Kptlt. Karl-Ernst Schroeter
Oct, 1940	-	5 Nov 1940	Oblt. Otto Harms
6 Nov 1940	-	27 Nov 1940	Oblt. Adalbert Schnee (Knights Cross)
31 Mar 1941	-	8 Jul 1941	Oblt. Egon Reiner Freiherr von Schlippenbach (Knights Cross)
9 Jul 1941	-	25 Mar 1942	Kptlt. Gert Hetschko
26 Mar 1942	-	19 Apr 1942	Oblt. Ernst von Witzendorff
16 May 1942	-	8 Feb 1943	Oblt. Otto Westphalen (Knights Cross)
Sep, 1942	-	Dec, 1942	Ltn. Otto Hübschen (in deputize) -- acting
9 Feb 1943	-	22 Feb 1944	Oblt. Ewald Hülsenbeck
23 Feb 1944	-	5 May 1945	Oblt. (R) Friedrich Horst

Career
No patrols

28 May 1940	-	30 Jun 1940	U-Bootschulflottille (school boat)
1 Jul 1940	-	25 Mar 1942	21. Flottille (school boat)
26 Mar 1942	-	15 May 1942	24. Flottille (school boat)
16 May 1942	-	16 Mar 1945	21. Flottille (school boat)
17 Mar 1945	-	5 May 1945	31. Flottille (school boat)

Successes

No ships sunk or damaged

Fate

Scuttled on 5 May 1945 at Alten Hafen in Wesermünde. Raised on 2 December 1949 and broken up.

Final location

Men lost from U-boats

Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-121 did not suffer any casualties (we know of) until the time of her loss.