Hm, the ice in the fairway was spotted and the change of course 20° port to avoid the ice took place at 23.39 hrs local time and then the tanker continued on the wrong course for 30 minutes to ran aground miles off the fairway. So somebody forgot to change the course back 20° starboard at 23.41 hrs to continue the trip.
So who was ultimately responsible for the error? Of course the ship owner. But no, poor Master Hazelwood was made a scapegoat, etc, etc. He was drunk!
As I remember all were drunk on all the ships at that time apart from the people on the bridge. What else could you do at sea on your spare time in 1988?