German submarine U-544

German submarine U-544 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II.

She was laid down at the Deutsche Werft (yard) in Hamburg as yard number 365 on 8 July 1942, launched on 17 February 1943 and commissioned on 5 May with Korvettenkapitän Willy Mattke in command.

U-544 began her service career with training as part of the 4th U-boat Flotilla from 5 May 1943. She was reassigned to the 10th flotilla for operations on 1 November.

She carried out one patrol and did not sink any ships. She was a member of five wolfpacks.

She was sunk on 16 January 1944 northwest of the Azores by American aircraft.

Design
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-544 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-544 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.

Patrol and loss
The boat departed Kiel on 9 November 1943, moved through the North Sea, negotiated the 'gap' between Iceland and the Faroe Islands and entered the Atlantic Ocean.

She was sunk on 16 January 1944 northwest of the Azores by American aircraft from the escort carrier USS Guadalcanal (CVE-60) using rockets and depth charges.

Fifty-seven men died; there were no survivors.

Wolfpacks
U-544 took part in five wolfpacks, namely:
 * Coronel (4 – 8 December 1943)
 * Coronel 1 (8 – 14 December 1943)
 * Coronel 2 (14 – 17 December 1943)
 * Föhr (18 – 23 December 1943)
 * Rügen 6 (26 – 31 December 1943)