Command Failure
From what I've read of it the ultimate problem was a poisonous command atmosphere, lack of training and shortage of personnel.
It's a warship being navigated - it literally is not rocket science, navies have been doing it around the world for centuries.
The US military hammers down any individuality in it's Officers and Men - Ratings are trained for one task alone and not encouraged to think out of the box. It's stunning that the bridge on a US Navy Warship could be so dis-functional - but it was.