German submarine U-18 under repair at Kiel, Germany in March 1937

American naval attaché at Berlin, Germany reported on 30 March 1937 that he recently passed the waterfront of the Krupp Germaniawerft at Kiel, Germany. The U-18 (1) was sighted on a floating drydock and apparently fairly well along to be completely repaired. When she was recommissioned included the six at Kiel under construction would the German navy number 40 submarines.

Note

1. Type IIB coastal submarine. Building ordered on 2 February 1935, laid down by Germania werft, Kiel with yard number 548 on 10 July 1935, launched on 7 December 1935, commissioned on 4 January 1936, sunk in a collision on 20 November 1936, salvaged on 28 November, repaired and scuttled at Constanta, Romania on 25 August 1944.

Source

National Archives USA. Record Group 38: Records of the Office of the Chief of Naval Operations. Series: Secret Naval Attaches Reports. Estimate of potential military strength (pt.). Summaries. Reports from London, Paris, Brussels, Rome and Berlin. Roll M975-001.