Walter quoted:
"I believe that this argument is strong enough to have justified its consideration at the inquiries – ignorance of a system that has been used in SAR and special forces helicopters in NATO countries since the 1980s is inexcuseable".
That appears to be a very arrogant statement. Inexcusable in whom? If the aircraft were not so equipped, then it's totally irrelevant.
You have already made contact with some of us who were in theatre and trained to do the same job as this crew. Sorry to disappoint you, but we are saying that your line of inquiry is irrelevant because the type of equipment you are referring to was not in use in theatre.