German mine service according to the Dutch magazine Marineblad dated 1937 no. 4

An item referred to the magazine Le Yacht dated 17 April 1937 reporting that the German navy possessed 28 minesweepers with a displacement of 475-525 tons a speed of 16 knots and a draught of 2,20 metres dating from 1918. The naval program of 1935 mentioned the building of 12-600 ton minesweepers.