Manslaughter charges have been brought against four crew members from the sunken South Korean ferry.
The prosecution also charged all 11 other surviving crew members of the Sewol ferry for negligence.
The ship capsized last month killing more than 280 passengers - most of who were children.
The crew has been under criminal investigations after they were believed to have escaped the sinking vessel before many of the passengers.
The ferry sank about 20 km (12 miles) off the southwest coast of South Korea on April 16 with 476 passengers and crew on board.
Among the passengers were 339 children and teachers on a high school outing to the southern island of Jeju.
South Korea's prime minister Chung Hong-won resigned last month over his government's handling of the disaster.