Type | VIIB | |||||||||||||
| Ordered | 2 Jun 1938 | |||||||||||||
| Laid down | 5 Nov 1939 | Bremer Vulkan-Vegesacker Werft, Bremen-Vegesack (werk 1) | ||||||||||||
| Launched | 27 Jul 1940 | |||||||||||||
| Commissioned | 30 Sep 1940 | Kptlt. Helmut Rosenbaum (Knights Cross) | ||||||||||||
| Commanders |
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| Career 15 patrols |
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| Successes | 8 ships sunk, total tonnage 43,945 GRT 4 warships sunk, total tonnage 22,947 tons (lost aboard transport ships) 3 ships damaged, total tonnage 22,928 GRT | |||||||||||||
| Fate | Sunk 16 Dec, 1943 in the Mediterranean near Oran, in position 36.07N, 00.50W, by depth charges and gunfire from the US destroyers USS Woolsey and USS Trippe. 16 dead and 34 survivors. | |||||||||||||
| Loss position | ||||||||||||||
Wolfpack operations
U-73 operated with the following Wolfpacks during its career:
West (31 May 1941 - 16 Jun 1941)
Kurfürst (16 Jun 1941 - 20 Jun 1941)
Grönland (12 Aug 1941 - 27 Aug 1941)
Reissewolf (21 Oct 1941 - 31 Oct 1941)
Wal (10 Nov 1942 - 15 Nov 1942)
Attacks on this boat and other events
22 Mar 1942
11.50 hrs, about 50 miles northwest of Derna, Libya: the boat was attacked by Blenheim MkIV Z7793 (RAF Sqdn 203/M, pilot P/O Beresford-Peirse). U-73 crash-dived on sighting the aircraft (misidentified as a Beaufort), but the four 250lb A/S bombs dropped caused severe damage that left the boat temporarily unable to dive and forced Rosenbaum to abort the patrol. (Sources: KTB U-73/ORB 203 Sqn RAF)
5 Dec 1942
The boat was damaged so severely by aircraft attack in the Mediterranean that she had to return to base.
27 Dec 1942
07.15 hrs, NW of Algiers: British Wellington bomber LA971 (RAF Sqdn 179/T, pilot F/L A.H. Comfort) attacked using the Leigh Light following radar contact, but the boat, forewarned by Metox, immediately opened fire with the AA guns, scoring hits on the port engine. Four depth charges dropped missed and the Wellington (misidentified as a Beaufort by U-73) was forced to make for the coast, reaching Tafaraoui only after jettisoning all loose equipment. (Sources: Franks/Zimmerman)
27 Dec 1942
Aircraft attack, aircraft shot down:British Hudson AM638 (RAF Sqdn 500/M, pilot P/O J.R. Pugh)
08.17 hours, Mediterranean NW of Algiers: flak hits to the cockpit area and starboard engine during the initial strafing run caused four depth charges dropped by the aircraft to fall wide by 80 to 250m, causing only light damage. The aircraft attempted to reach the coast some 50 miles distant, but had to ditch only three minutes after the attack. The crew of four were rescued from their dinghy in the afternoon of the same day by a Walrus flying boat (700 Sqdn FAA, pilot Sub Lt Neil Fuller) escorted by Hudsons from 500 and 608 Sqdns RAF).
(Sources: Franks/Zimmerman)27 Jun 1943
The boat was forced to return to base due to heavy damage after being depth charged by escorts in the Mediterranean.
30 Oct 1943
The attack on 30 Oct, 1943 in the Mediterranean southeast of Toulon, France, in position 43.04N, 05.57E, with a torpedo from the British submarine HMS Ultimatum, formerly credited with sinking U-431, was actually against U-73, which escaped unscathed.
13 Dec 1943
During an attack against convoy GUS-24 in the Mediterranean, U-73 was rammed by a destroyer, resulting in the loss of her quadruple machine gun.
7 recorded attacks on this boat.
General notes on this boat
11 Aug 1942. U-73 sank the British aircraft carrier HMS Eagle in position 38.05N, 03.02E.
Radiogram sent by U-73 on 11 Aug, 1942:
Geleit - 15 Zerstörer und Geleitboote, 2 Kreuzer, 9 bis 10 Frachter, 1 Flugzeugträger, 1 Schlachtschiff wahrscheinlich. Fächerschuß auf Flugzeugträger. Vier Treffer aus 500 Meter Entfernung. Starke Sinkgeräusche.
- Alles klar! -
Rosenbaum
Convoy - 15 destroyers and escort ships, 2 cruisers, 9 to 10 freighters, one aircraft carrier, probably one battleship. Fan shot against aircraft carrier. 4 hits from 500 meters distance. Strongly audible sinking noises.
- All clear! -
Rosenbaum
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-73 did not suffer any casualties (we know of) until the time of her loss.
U-boat Emblems
We have 3 emblem entry for this boat! See the emblem page for this boat or view each one below.
 Tree | An Axe with "USA" text | Shield with castle and bird of prey |
Media links
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There was another U-73 in World War One
That boat was launched from its shipyard on 16 Jun 1915 and commissioned into the Imperial Navy on 9 Oct 1915. The Naval war in WWI was brought to an end with the Armistice signed on 11 Nov, 1918. Read about the U 73 during WWI.