Hi Flying Head,
How come they never flew near BlackSOD though if this was the case?
Looking at AIS data there were about 5nm south of BlackSOD on track to BlackROCK. At no point on ATC or Coast Guard frequency did they say that they were approaching BlackROCK to get visual. 2 minutes before the crash as they commenced the 180 degrees turn the said that they were approaching BlackSOD. This indicates to me that the crew may have thought that they were approaching BlackSOD instead.
Just my interpretation of the evidence so far and I'm sure I could be far from the truth.