(ANSA) - Grosseto, September 12 - Several members of the Costa Concordia crew were not sufficiently familiar with their emergency duties on the night of the disaster that claimed 32 lives, an expert report said on Wednesday. "Part of the crew with key responsibilities did not know their duties in the case of an emergency," said an expert report on the contents of the ship's black box commissioned by the preliminary hearings judge for the case. The report added that people without the appropriate certification were put in charge of some lifeboats on the night of the January 13 disaster. It also said that "not all of the crew were able to understand the instructions in the case of emergency in the working language (Italian)". The Concordia capsized after hitting a rock while sailing close to the small Tuscan island of Giglio to 'salute' local residents in one of Italy's worst maritime disasters since the Second World War. Captain Francesco Schettino is being investigated on charges of manslaughter, abandoning ship, and failing to communicate with maritime authorities in the crash. The commander was dubbed 'captain coward' in the international media after recordings of a conversation with coast guards suggested he refused orders to return to the semi-submerged Concordia after leaving before evacuation operations had been completed.