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German submarine U-139

Type II
German submarine U-139 was a Type IID U-boat of Nazi Germany's Kriegsmarine during World War II. Her keel was laid down on 20 November 1939 by Deutsche Werke in Kiel as yard number 268. She was launched on 28 June 1940 and commissioned on 24 July... Wikipedia
Launched: June 28, 1940
Speed: 12.7 knots (23.5 km/h; 14.6 mph) surfaced; 7.4 knots (13.7 km/h; 8.5 mph) submerged
Test depth: 80 m (260 ft)