AIS , GPS and secondary system which was alarmed were all over ridden. Other than pilot error there was nothing to be done. The Captain and officers bailing and "organizing rescue efforts from shore" will long be remembered as one of the maritime messes in history.
After abandoning ship, leaving many dead and refusing to return to the ship after being directed by maritime disaster coast guard to return to the ship, the captain launched an unlawful dismissal suit after the cruise line punted him.