"Ubåd" . . "Vojna mornarica Podmornice 20.stol." . . . . "Chronicles the history of the submarine and discusses its technological development and its fighting record in two world wars."@en . . . . "History" . "History"@en . . "Submarines" . "Submarines"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Submarines." . . "1. Verdenskrig 1914-1918" . . "Unterseeboot." . . "2. Verdenskrig 1939-1945" . . "Geschichte." . . "Udvikling" . . . .