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The conversion would take, per ship, 400 workers, 2000 tons of steel, and 2 years. The result would make 28 knots, and have a flight deck only 10m shorter than that of Seydlitz which was already planned for conversion. (There is a little bit more detail but the German is too hard for me; no drawing.) The conversion plan was abandoned because of Hitler's 1943 order to scrap the surface fleet.