The engine was built by G. Seebeck AG., Wesermünde, Germany.

[2] Fladengrund was built as yard number 418 by G. Seebeck AG., Wesermünde, Germany.

Owned by the Norddeutsche Hochseefischerei,[2] her port of registry was Wesermünde.

She was allocated the Code Letters KRBT,[1] and the fishing boat registration PG 340.

[3] On 26 April 1944, Fladengrund was bombed and sunk in the Bay of Biscay west of Saint-Nazaire, Loire-Inférieure and south of Belle Île, Finistère, France (47°06′N 2°58′W / 47.100°N 2.967°W / 47.100; -2.967) in an attack by a Royal Air Force Handley Page Halifax aircraft with the loss of 21 of her 38 crew.