However the route was generated and whatever it flew them towards there is still the issue of accepting flight over a RADAR return at very low height above the ocean.
Surely the Golden Rule is we shalt not fly over ANYTHING unless we have visual contact with it prior to DR. As such any target in front of us becomes the intermediate destination and the MDH/MDA and DR rules should apply. Or go round it leaving the required safety margin.
The CVR is confusing and not at all clear that they "see" Blackrock" on the RADAR before the impact. Unless I have mistaken this.