U75:
The U-75 was a Type VII-C "Unterseeboot" (U-boat) built at Bremer Vulkan, Bremen-Vegesack (Yard No. 3) for the German Kriegsmarne for service during WWII. She was ordered on 02 June 1938, laid down 15 December 1939, launched 18 October 1940, and commissioned 19 December 1940 with Kptlt. Helmuth Ringelmann in command. Kptlt. (Note: Helmuth Ringelmann was this U-boat's only Commanding Officer during what is considered a "moderately" successful career with the sinking of 9 allied and military vessels totalling 38,628 tons.)
Specifications:

Displacement: 769 long tons (781 t) surfaced 871 long tons (885 t) submerged
Length: 67.1 m (220 ft 2 in) o/a 50.5 m (165 ft 8 in) pressure hull
Beam: 6.2 m (20 ft 4 in) o/a 4.7 m (15 ft 5 in) pressure hull
Draft: 4.72 m (15 ft 6 in)
Propulsion: Diesel-electric 2 × supercharged Germaniawerft, 6-cylinder, 4-stroke M6V 40/46 diesels totalling                  2,800-3,200 hp (2,088-2,386 kW). Max rpm: 470-490
Speed: 17.7 knots (20.4 mph/32.8 km/h) surfaced 7.6 knots (8.7 mph/14.1 km/h) submerged
Range: 15,170 km (8,190 nmi) at 10 kn (19 km/h) surfaced 150 km (81 nmi) at 4 kn (7.4 km/h) submerged
Test depth: 230 m (750 ft)
Calculated crush depth: 250-295 m (820-970 ft)
Complement: 44-52 officers & ratings
Armament:   5 × 533 mm (21 in) torpedo tubes (4 bow, 1 stern), 14 × torpedoes or 26 TMA or 39 TMB                   mines, 1 × C35 88mm gun/L45 deck gun with 220 rounds, Various FLAK weaponry.
A Type VIIC at the German navy memorial at Laboe (from Wikipedia)
On 28 December 1941, the U-75 reported sinking 2 ships in convoy ME-8 and damaging another ship. (The Volo was actually the only ship hit and sunk.) This was the last communication from the submarine.

After the attack the U-75 was now on the run from the convoy escorts HMS Kipling and others. The U-75 was depth charged and sunk at postion 31.50N/26.40E by the HMS Kipling after a 2 and a half hour hunt. 14 crew members reported dead and 30 survivors.
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