Too much dependence on computers? Captain's crew members get complacent, over confident, and sleep with their eyes open or spend too much time in the latrine playing with their cell phones? Lack of seriousness about the  care of hugely expensive boat? Just like the submarine accident here that killed a number of young Japanese sailors in training. Maybe needs to start hiring college degrees and more qualified gays. Remember that air pilot simulators? Make one for everybody who deals with sailing a ship and put them into emergency situations with horns blowing, red lights flashing, and sirens making you deaf. Same for battle situations. Should be done in training schools and again and again when docked in port. Those are expensive ships.