The five include Roberto Ferrarini, the director of ship owner Costa Crociere's crisis unit, and Jacob Rusli Bin, the luxury liner's Indonesian helmsman, as well Captain Francesco Schettino's deputy and two other crew members.
Schettino, who is accused of multiple manslaughter and abandoning ship, is currently the only one standing trial for the deadly accident off Giglio island in Tuscany which left 32 people dead in January last year.
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