The Costa Concordia ran aground and capsized Jan. 13 off Tuscany's Giglio island after Capt. Francesco Schettino took it off course in a stunt. He and eight others are on trial.
In a 270-page analysis, the experts said a series of problems hobbled the response to Schettino's maneuver and contributed to the botched evacuation: crew members bungled directions, didn't understand orders and weren't trained in emergency drills.
And they said ship owner Costa Crociere delayed alerting coastal authorities of the emergency, a charge Costa denied Thursday.