German submarine U-662 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.She was laid down on 7 May 1941 by Deutsche Werft, Hamburg as yard number 811, launched on 22 January 1942 and commissioned on 9 April 1942 under Kapitänleutnant Wolfgang Hermann.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-662 had a displacement of 769t when at the surface and 871t while submerged. She had a total length of 67.1m (220.1feet), a pressure hull length of 50.5m (165.7feet), a beam of 6.2m (20.3feet), a height of 9.6m (31.5feet), and a draught of 4.74m (15.55feet). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of NaNPS for use while surfaced, two Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of 750PS for use while submerged. She had two shafts and two 1.23abbr=onNaNabbr=on propellers. The boat was capable of operating at depths of up to .
The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . U-662 was fitted with five 53.30NaN0 torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.82NaN2 SK C/35 naval gun, 220 rounds, and a 2sp=usNaNsp=us C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.
The boat's career began with training at 5th U-boat Flotilla on 9 April 1942, followed by active service on 1 October 1942 as part of the 7th Flotilla for the remainder of her service.
In 4 patrols she sank 3 merchant ships, for a total of and damaged one merchant ship.
U-662 took part in eleven wolfpacks, namely:
On the night on 26 December 1942 U-662 reported sighting Convoy ONS 154.
U-662 sunk the crippled and straggling Ville de Rouen which had been attacked earlier by .
On 19 July a US Liberator bomber dropped four depth charges, but broke off the attack after sustaining flak damage. U-662 escaped undamaged.
The next day, U-662 was again attacked by US aircraft, this time a Douglas B-18 Bolo aircraft, but again she escaped undamaged. She was sunk the following day.
U-662 was sunk on 21 July 1943 in the North Atlantic in position 3.9333°N -94°W, by depth charges from US Catalina from Patrol Squadron VP-94. Apart from the commander and two other crew members, all hands were lost.
Oberleutnant zur See Heinz-Eberhard Müller was so severely injured that he was repatriated to Germany in March 1944 as he was no longer fit for combat.
"On 21 July 1943 he was attacked for an hour by Lt. Stan Auslander, USN, in a PBY and then was sent to the bottom by another Catalina piloted by Ltjg. R. H. Howland USNR. MUELLER HAD BOTH ARMES AND ONE LEG BROKEN AND INTERNAL INJURIES. He was kept afloat and alive by his chief mate, one Horst Gaertner. Gaertner swam around with Mueller in his arms for seven days, until they were picked up by a patrol craft."[1]
| Date | Ship Name | Nationality | Tonnage (GRT) | Fate[2] | |
|---|---|---|---|---|---|
| 29 December 1942 | Ville de Rouen |  United Kingdom | 5,598 | Sunk | |
| 29 March 1943 | Empire Whale | United Kingdom | 6,159 | Sunk | |
| 29 March 1943 | Ocean Viceroy | United Kingdom | 7,174 | Damaged | |
| 29 March 1943 | Umaria | United Kingdom | 6,852 | Sunk |