Sinking of the MS Jan Heweliusz: In Poland's worst peacetime maritime disaster, ferry MS Jan Heweliusz sinks off the coast of Rügen, drowning 55 passengers and crew; nine crew-members are saved.

MS Jan Heweliusz sank on 14 January 1993, between about 04:10 and 05:12 (UTC+1) as the ship was crossing the Baltic Sea, en route from Świnoujście, Poland, to Ystad, Sweden. Out of 64 passengers and crew, 55 died in the disaster, making it the largest peacetime maritime disaster in Polish history.

MS Jan Heweliusz was a Norwegian-built Polish ferry named after astronomer Johannes Hevelius that served on the route Ystad–Świnoujście. It was built in Norway in 1977 and was owned by Polish Ocean Lines and operated by its subsidiary company Euroafrica Shipping Lines.

Rügen is Germany's largest island. It is located off the Pomeranian coast in the Baltic Sea and belongs to the state of Mecklenburg-Western Pomerania.