Sudden twang - they could have utilised the S92's capabilities with a letdown within 5 miles of Blacksod and never got anywhere near Blackrock.
They didn't but instead were drawn down an 'approved' route which was unsuitable in terms of design and warnings of the hazards.
Palacio - why are you so horrified by 200' at night? Granted they went down far to early but it is a good height for manoeuvre and final approach using SAR modes - especially if someone has given you NVD to use.