It is not exactly known what the Polish Army was going to use these people for. Presumably, they were supposed to man underwater human torpedoes, aimed at the destruction of German warships. Most probably, the Polish Army did not have the necessary equipment, but reportedly in the summer of 1939 in Gdynia, 83 selected volunteers were shown a special short movie about torpedoes manned by humans. An officer of the Navy who was present stated that Poland had 16 such torpedoes; they were eight meters long and weighed 420 kilograms. However, none of the volunteers ever saw these torpedoes. Some other volunteers were trained as glider pilots and parachute jumpers.