By A Mystery Man Writer
The U-boat War in World War Two (Kriegsmarine, 1939-1945) and World War One (Kaiserliche Marine, 1914-1918) and the Allied efforts to counter the threat. Over 40.000 pages on the officers, the boats, technology and the Allied efforts to counter the U-boat threat.
Submarines at War: From the Turtle to U-boats, nuclear submarines, and unmanned systems - Issuu
What the postman brought today (Armorama) - Armor/AFV - KitMaker Network
U-Boat deck gun, the research continues! – The Searchers
U166 (1942)
German U-boats from WWI and WWII seem to look the same and be used the same. What important advances in submarine technology and tactics happened between the two world wars? - Quora
המערכה באוקיינוס האטלנטי (1939–1945) - מרכיבי הקרב – ויקיפדיה
German submarine in the atlantic hi-res stock photography and images - Alamy
The Modelling News: Preview: Border Model's new 1/35th scale DKM Type VII-C U-boat conning tower & deck
U-boat, German Submarine Warfare in WWI & WWII
Munizionamento Cannone Sommergibili Regia Marina - Tecnica - Betasom - XI Gruppo Sommergibili Atlantici
Captured U-boats and their Fate - HubPages