 The Germans had no intention to carry out the landings which the Worek Plan was designed to oppose.However an operational plan failed mainly due to its pure defensive nature, as an opposite to the aggressive - pure offensive nature of submarines, by their characteristics not intended and prepared to fulfill defensive roles.According to contemporary research, Polish submarine campaign in September 1939 failed, due to misunderstanding of nature of modern submarine warfare in high command of Polish Navy, particularly by Commander-in-Chief of the Polish Naval Command vice admiral Józef Unrug, who refused to accept any of a few offensive operational plans prepared by the Chief of Submarine Squadron commander Aleksander Mohuczy.