Core answer: The Jan Heweliusz ferry disaster resulted in 55 fatalities, with 9 survivors. Most sources indicate 64 people aboard (passengers and crew combined) and that 9 survived, while 55 died and 10 bodies were never found. Details and context:

• Survivors: Nine people survived, all crew members, who were evacuated to German hospitals for hypothermia treatment. This figure appears consistently across multiple contemporary reports.

• Fatalities: The disaster claimed 55 lives (commonly reported as 55: 20 crew and 35 passengers). Some older Polish sources mention 56 fatalities, but the widely cited figure in English-language and Polish summaries is 55 deaths.

• Missing: Several sources note that a number of bodies were never recovered; estimates vary, but commonly cited figures include 10 bodies unrecovered or 6–10 depending on source.

• Event specifics: The sinking occurred in the Baltic Sea in January 1993 when the Polish ferry M/F Jan Heweliusz capsized and sank off Cape Arcona near Rügen, with the vessel carrying 64 people and sinking in roughly 27 meters of water. The incident is described as Poland’s deadliest peacetime maritime disaster.

Notes on sources:

• The most authoritative summaries list 64 people aboard, 55 fatalities, and 9 survivors, with the remaining bodies either unrecovered or unaccounted for depending on the report. Some Polish-language sources from 2004 and later provide slightly different tallies (e.g., 56 fatalities or 9 survivors), reflecting historical record inconsistencies, but the consensus figure used in widely cited English-language and Polish histories is 55 fatalities and 9 survivors.

If you’d like, I can pull the most up-to-date verification from specific sources or present a concise timeline of the rescue operations and investigation findings.