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.
Type VII U-boat > WW2 Weapons
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Munizionamento Cannone Sommergibili Regia Marina - Tecnica - Betasom - XI Gruppo Sommergibili Atlantici
World War II German U-Boat Documents, Manuals, Diaries
Submarine Toilets — Toilets of the World
Anti-aircraft guns on U-boats - Technical pages - German U-boats
Deck gun - Wikipedia
המערכה באוקיינוס האטלנטי (1939–1945) - מרכיבי הקרב – ויקיפדיה
How many U-boats were sunk in the Atlantic? - Quora
Why were the guns on submarines still usable after being underwater? Wouldn't the guns rust or jam being exposed to sea water? - Quora
Captured U-boats and their Fate - HubPages
Type VII U-boat > WW2 Weapons