ORP Groźny (Jastarnia)
Groźny is a Soviet-built submarine-chaser taken over by the Polish Navy in 1957 and sunk deliberately in 1971 as a training object. It is over 52 m long and lies at 18 m (official list: 10.7 to 18.5 m). Its open bridge lets divers pass through safely, which makes it a favourite beginner wreck in Puck Bay.
Tiefe: 11–19 m