The trial over the sinking of the Sea Diamond cruise liner off Santorini in 2007 began on Tuesday but was adjourned until March 26.
Two French tourists, Jean Christophe Allain, 45, and his daughter Maud, 16, lost their lives in the accident, which happened in 2007 after the ship hit a volcanic reef.
More than 60 people are expected to give evidence as part of the trial at the misdemeanors court in Piraeus.
A total of 13 people face charges in connection with the sinking of the ship, owned by Louis Hellenic Cruise Lines.
All the charges are misdemeanors.