Sources
The following webpages contain material related to U-86:
The plans for U-63 were found on this webpage. The page also contains a wealth of information relating to naval technology of WW1.
www.wlb-stuttgart.de/bfz/marine/index.htm
The naval archive in the Bibliothek für Zeitgeschichte in der Württembergischen Landesbibliothek holds an extensive collection of photographs of U-boats from both World Wars.
U-boat net is probably the most extensive web archive of everything and anything related to U-boats.
www.gwpda.org/naval/lcastl10.htm
This webpage has extensive information on the sinking of the Llandovery Castle.
www.juergenthuro.de/html/8_8_wki.html
Information on the guns on U-86 was extracted from these two webpages.
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