The Polish submarine ORP Orzeł was launched at the Dutch shipyard De Schelde in Vlissingen in 1938. She was the first Eagle-class ship. As soon as the hostilities began, he took part in the initial phase of the defense of the Coast. It was planned to use it against the battleship "Schelswig-Holstein", but the idea was abandoned. After the adventures of an internment attempt in Tallinn, a voyage without maps through the Baltic straits, on October 14, 1939 ORP Orzeł reached Great Britain. There, he began regular patrols, crowned with success, ie the sinking of the German transport ship "Rio de Janeiro". On May 23, the ship set out on her next patrol, during which she is sinking mysteriously. Technical data: Surface displacement: 1110t, length: 84m, width: 6.7m, draft: 4.17m, maximum immersion depth: 100m, speed (surface): up to 19.4 knots, underwater - 8.9 knots, crew: 60 , armament: 12 torpedo tubes 550mm caliber, 1 Bofors 105mm wz.36 gun, 1 dual 40mm wz.36 l / 60 Bofors anti-aircraft gun, 1 x 13.2mm wz.30 MG gun.