The ship 119feet long, with a beam of 24feet. She had a depth of 10feet. She was assessed at, . She was powered by a diesel engine, which had 8 cylinders of 11inches diameter by NaNinches stroke. The engine was built by Klöckner-Humboldt-Deutz AG, Köln, Germany. It was rated at 94 nhp. It drove a single screw propeller.[1] It could propel the ship at 10.5kn.
Derfflinger was built as yard number 128 by Schulte & Bruns, Emden, Germany. She was launched on 16 February 1939 and completed on 29 March. She was owned by the Großer Kurfürst Heringfischerei AG, Emden Her port of registry was Emden. She was allocated the Code Letters DGMY,[1] and the fishing boat registration AE 95.
On 9 October 1939, Derfflinger was requisitioned by the Kriegsmarine, serving with 14 Minensuchflotille as the minesweeper M 1401. On 22 March 1942, she was reallocated to 44 Minensuchflotille and her pennant number was changed to M 4412. On 1 January 1943, she was designated as a vorpostenboot. She was allocated to 6 Vorpostenflotille as V 620 Derfflinger. In 1945, she was seized by the French and entered service with the French Navy as part of the 28eme Division de Drageurs. She was allocated the Pennant Number B 283.
On 4 September 1948, she was sold to the Société de Péche Industrielle, Boulogne,[2] and was renamed André Guillaume. The fishing boat B 2487 was allocated. She served until December 1953, when she was scrapped.