The Italian Coast Guard said Tuesday it has located the second "black box," or data recorder, from the Costa Concordia cruise ship that wrecked off Italy's western coast, killing at least six people.

Operations were underway to retrieve the recorder, said Warrant Petty Officer Massimo Macaroni of the Italian Coast Guard.

Information from the device, along with that from another that has already been recovered and is being analyzed by prosecutors, will provide authorities with "a complete picture of how the disaster unfolded," Macaroni said.

Also Tuesday, authorities will question the cruise ship captain at a closed hearing, his attorney said.

Francesco Schettino is under arrest and may face charges that include manslaughter, shipwreck, and abandoning a ship when passengers were still on board, according to Italian prosecutor Francesco Verusio.

Schettino could face up to 15 years in prison, he said.

At the closed hearing, a preliminary investigation judge will decide whether Schettino will remain detained. The captain has not yet been questioned, but more than 100 witnesses, including passengers and crew, have been interviewed, the prosecutor said.