|German submarine U-548|
|Ordered:||5 June 1941|
|Builder:||Deutsche Werft, Hamburg|
|Laid down:||4 September 1942|
|Launched:||14 April 1943|
|Commissioned:||30 June 1943|
|Fate:||Sunk, April 1945 by depth charges from American warships southeast of Halifax, Nova Scotia|
|Type:||Type IXC submarine|
1,120 t (1,100 long tons) surfaced|
1,232 t (1,213 long tons) submerged
76.8 m (252 ft 0 in) overall|
58.7 m (192 ft 7 in) pressure hull
6.8 m (22 ft 4 in) overall|
4.4 m (14 ft 5 in) pressure hull
|Height:||9.4 m (30 ft 10 in)|
|Draft:||4.7 m (15 ft 5 in)|
2 × MAN M9V40/46 supercharged 9-cylinder diesel engines, 4,000 hp (2,983 kW)|
2 × SSW GU345/34 double-acting electric motors, 1,000 hp (746 kW)
18.2 knots (33.7 km/h) surfaced|
7.3 knots (13.5 km/h) submerged
24,880 nmi (46,080 km) at 10 knots (19 km/h) surfaced|
117 nmi (217 km) at 4 kn (7.4 km/h) submerged
|Test depth:||230 m (750 ft)|
|Complement:||48 to 56|
6 × torpedo tubes (four bow, two stern)|
22 × 55 cm (22 in) torpedoes
1 × 10.5 cm SK C/32 naval gun (110 rounds)
4th U-boat Flotilla|
(30 June 1943–31 March 1944)
2nd U-boat Flotilla
(1 April–30 September 1944)
33rd U-boat Flotilla
(1 October 1944–19 April 1945)
Kptlt. Eberhard Zimmermann|
(30 June 1943–8 February 1945)
Kplt. Günther Pfeffer
(9 February–19 April 1945)
21 March–24 June 1944
11 August–25 September 1944
7–12 October 1944
5 March–19 April 1945
|Victories:||One warship sunk, 1,445 tons|
She was laid down at the Deutsche Werft (yard) in Hamburg as 'werk' 369 on 4 September 1942, launched on 14 April 1943 and commissioned on 30 June with Kapitänleutnant Eberhard Zimmermann in command.
U-548 began her service career with training as part of the 4th U-boat Flotilla from 30 June 1943. She was re-assigned to the 2nd flotilla for operations on 1 April 1944, then the 33rd flotilla on 1 October.
She carried out four patrols and sank one ship. She was sunk in April 1945 by depth charges from American warships southeast of Halifax, Nova Scotia.
U-548's first patrol began with her departure from Kiel on 21 March 1944. She passed through the 'gap' separating Iceland and the Faroe Islands before heading out into the Atlantic Ocean. The boat was involved in a rather bizarre incident on the night of 3 May when a B-24 Liberator illuminated HMS Hargood east of Conception Bay, Newfoundland, thinking she was a U-boat. U-548 fired at the aircraft which in turn wrongly assumed they had been engaged by the ship. The real quarry aborted her attack and escaped.
The boat was the target of an unsuccessful hunt by Allied escorts after the sinking of HMCS Valleyfield on 7 May 50 mi (80 km) south of Cape Race, (Newfoundland).
She entered Lorient, on the French Atlantic coast, on 24 June 1944.
2nd and 3rd patrols
On her second foray, U-548 lost a man overboard, (Mechanikergefreiter (A) Walter Heise), during a crash-dive on 30 August 1944. Reversing the course of her first patrol, she arrived at Bergen in Norway, on 25 September.
Having moved to Hölen (southeast of Stavanger) in Norway, the boat began her third sortie on 7 October 1944. She docked at Flensburg on the 12th.
4th patrol and loss
By now, U-548 was based at Horten (south of Oslo) also in Norway, from where she began her fourth and last patrol on 5 March 1945. She crossed the Atlantic once more and was sunk southeast of Halifax, Nova Scotia on 19 April by depth charges from the American destroyer escorts USS Reuben James and Buckley.
Fifty-eight men died with the U-boat; there were no survivors.
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