German submarine U-804

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Career (Nazi Germany)
Name: U-804
Ordered: 7 December 1940[1]
Builder: Deutsche Schiff- und Maschinenbau AG, Bremen[1]
Laid down: 1 December 1942[1]
Launched: 1 April 1943[1]
Commissioned: 4 December 1943[1]
Fate: Sunk 9 April 1945 in the Skagerrak west of Göteborg, Sweden by rockets from RAF Mosquito aircraft (Sqdn 143 & 235). 55 dead (all hands lost).[2]
General characteristics [3]
Type: Type IXC/40 submarine
Displacement: 1,144 t (1,126 long tons) surfaced
1,257 t (1,237 long tons) submerged
Length: 76.76 m (251 ft 10 in) o/a
58.75 m (192 ft 9 in) pressure hull
Beam: 6.86 m (22 ft 6 in) o/a 4.44 m (14 ft 7 in) pressure hull
Height: 9.6 m (31 ft 6 in)
Draft: 4.67 m (15 ft 4 in)
Propulsion: 2 × MAN M 9 V 40/46 supercharged 9-cylinder diesel engines, 4,400 hp (3,281 kW)
2 × SSW GU 345/34 double-acting electric motors, 1,000 hp (746 kW)
Speed: 19 knots (35 km/h; 22 mph) surfaced
7.3 knots (13.5 km/h; 8.4 mph) submerged
Range: 138,500 nmi (256,500 km; 159,400 mi) at 10 knots (19 km/h) surfaced
63 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth: 230 m (750 ft)
Complement: 4 officers, 44 enlisted
Service record
Part of: 10th U-boat Flotilla
(1 July 1944–30 September 1944)
33rd U-boat Flotilla
(1 October 1944–9 April 1945)
Commanders: Oberleutnant zur See Herbert Meyer
(4 December 1943–9 April 1945)
Operations: 1st patrol: 19 June - 12 October 1944
2nd patrol: 4–9 April 1945
Victories: 1

German submarine U-804 was a Type IXC/41 U-boat of Nazi Germany's Kriegsmarine during World War II. U-804 was ordered on 7 December 1940, and was laid down on 1 December 1942 at Deutsche Schiff- und Maschinenbau AG, Bremen as 'werk 362'. She was launched on 1 April 1943 and commissioned under the command of Oberleutnant zur See Herbert Meyer on 4 December of that year.[2][4]

Service Record[edit]


U-804 began training exercises with the 4th U-boat Flotilla on 4 December 1943, and finished her sea trials on 30 June 1944. On 16 June 1944, U-804 was attacked by a Norwegian Mosquito aircraft from No. 333 Squadron RAF, but succeeded in shooting down its attacker at the cost of eight crew members wounded; only minor damage was inflicted on the submarine. The two-man crew of the Mosquito was picked up by U-1000 on 18 June, and taken to occupied Norway.[2]

First patrol[edit]

U-804 began her first war patrol on 19 June 1944 (while still undergoing training) with the 10th U-boat Flotilla. She left Bergen and headed into the North Sea, passing north of the British Isles into the North Atlantic, where she remained for 116 days. On 2 August, during a special hunt for several submarines known to be transmitting weather information from stations in the central and north Atlantic (of which effort U-804 was a part), two American destroyer escorts, Fiske and Douglas L. Howard, were detached from the task group to investigate the whereabouts of U-804, which both had made contact with. Upon sighting the destroyers, the U-boat quickly dived, but the two escorts detected her on their sonar and began their attack approach. Suddenly, USS Fiske was torpedoed on her starboard side by U-804, and within 10 minutes, she broke in two. Thirty-three of her men were killed and 50 were wounded, but all the survivors were rescued by USS Farquhar. Amidst the confusion following the sinking of USS Fiske, U-804 slipped away and returned to her patrol.[5][6]

Second patrol[edit]

On 12 October 1944, U-804 returned to the port of Flensburg after 116 days at sea. Five days later she left Flensburg for Kiel, where she remained until 4 April 1945 before leaving for occupied Norway. While en route in company with another of the flotilla's boats, U-1065, the two submarines were detected and attacked in the Skagerrak strait on 9 April 1945 by over 30 Mosquito aircraft from three Royal Air Force squadrons based at Banff. U-1065 succeeded in shooting down one of the attacking aircraft before being hit by several rockets fired by 10 Mosquitos from 143 and 235 Squadrons; she exploded and sank with the loss of her crew of 45 men.


U-804 suffered the same fate - after being hit by rockets from the attacking Mosquitos she also exploded and sank at 57°58′N 11°15′E / 57.967°N 11.250°E / 57.967; 11.250, with no survivors from her crew of 55 men.[2][5]

Summary of Raiding Career[7][edit]

Date Ship Nationality Tonnage Fate
2 August 1944 USS Fiske  United States Navy 1,300 Sunk

See also[edit]


  1. ^ a b c d e "U-804 Type IXC/40". Retrieved 3 March 2010. [dead link]
  2. ^ a b c d Helgason, Guðmundur. "U-804". U-Boat War in World War II. Retrieved 3 March 2010. 
  3. ^ Gröner, p. 105-7.
  4. ^ Helgason, Guðmundur. "Type IXC/40". U-Boat War in World War II. Retrieved 3 March 2010. 
  5. ^ a b Helgason, Guðmundur. "Patrol info for U-804 (first patrol)". U-Boat War in World War II. Retrieved 5 March 2010. 
  6. ^ Helgason, Guðmundur. "USS Fiske (DE 143)". Ships hit by U-boats. Retrieved 5 March 2010. 
  7. ^ "U-804 successes". Retrieved 12 February 2014. 
  • Gröner, Erich (1985). "U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher". Die deutschen Kriegsschiffe 1815-1945 III (Koblenz: Bernard&Graefe). ISBN 3-7637-4802-4.