[Aktungbby]

from the Italian:"the best armor is not to be on the battle field"...submarine warfare as concieved by Germany in both world wars is essentially' offset guerilla warfare' against a superior navy ie the massive Royal Navy1918-1945; since stealth and depth are only defence for the somewhat submersable torpedo boat-(not a true submarine!!??) shallow waters less than 300+ feet defeats the vessel's defense capability. Purely as a matter of logic, and facing the increasingly superior technology of air and surface vessels, utterly negates actions in coastal waters. Remember, as a policy and weapon system for "finding Germany's place in sun" under the Kaiser and his peasant successor Adolph," the concept was failure and an expensive strategic waste of expensive assets and men well above any military concept of tactical expendability at sea in pursuit of victory...whatever that is?!!