Characteristics of German submarine U 18 as reported to the British Admiralty on 20 January 1936

An item reported that the German Marineattaché captain Erwin Wassner at London informed the British Admiralty conform the Anglo-German Naval Agreement dated 18 June 1935 that the submarine U 18 laid down in July 1935was completed on 4 January 1936. Standard displacement (article 6 of Treaty) 250 tons/254 metric tons and as dimensions 41.6 (waterline) x 4.6 (extreme beam at or below waterline) x 3.85 . (average draught at standard displacement) metres. Heaviest calibre 2cm.

Source

Bundesarchiv. German Marineattaché at London. RM 12-II/119.