German submarine U-194

German submarine U-194 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine built during World War II for service in the Atlantic Ocean. Notable for having been fitted with the new Balkon sonar, she was a short-lived vessel, being sunk on her first and only operational war patrol.

Design
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-194 had a displacement of 1144 t when at the surface and 1257 t while submerged. The U-boat had a total length of 76.76 m, a pressure hull length of 58.75 m, a beam of 6.86 m, a height of 9.60 m, and a draught of 4.67 m. The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4400 PS for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1000 shp for use while submerged. She had two shafts and two 1.92 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 18.3 kn and a maximum submerged speed of 7.3 kn. When submerged, the boat could operate for 63 nmi at 4 kn; when surfaced, she could travel 13850 nmi at 10 kn. U-194 was fitted with six 53.3 cm torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm SK C/32 naval gun, 180 rounds, and a 3.7 cm SK C/30 as well as a 2 cm C/30 anti-aircraft gun. The boat had a complement of forty-eight.

Service history
U-194 was laid down in Bremen on 17 January 1942 and launched on 22 September. Kapitänleutnant Hermann Hesse took command upon commissioning on 8 January 1943.

Balkon group listening apparatus
The passive sonar, known as Gruppenhorchgerät (group listening apparatus) or GHG, fitted to early U-boats could not be used at periscope depth. To solve this, a new listening device, known as Balkon (balcony) fitted to a second, lower hull, was successfully tested on U-194 in January 1943.

Loss
Twelve days into her first and only patrol, U-194 was attacked and sunk by a homing torpedo from an American Consolidated PBY Catalina aircraft of VP-84 in position 59°N, -26.3°W. All 54 men aboard were lost. An initial post-war assessment gave credit for sinking U-194 to a British Consolidated B-24 Liberator aircraft of No. 120 Squadron RAF squadron, however this attack actually resulted in the sinking of GS U-200.