Both vessels, organised by the TUI tour operator, were on a seven-day cruise in the Adriatic. Their programme included a sightseeing tour of Rijeka and bus trips to Istria, Opatija, Kastav, Gorski Kotar, Zagreb and other destinations.
The passengers boarded the Marella Explorer 2 in Dubrovnik and the Mein Schiff 5 in Trieste.
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