PKPF68-77,
Perhaps sir if you were to read this thread from start to finish you might want to rephrase your question
"I have never understood how a fit helicopter crew, under full control of their aircraft, which was apparently viewed just under the stratus from the sea shortly before impact, could fly straight into the shrouded Mull hilltop from the south"
as the matter of "full control" has been covered quite succinctly by plenty of highly qualified and professional folk who DO "have practical experience of flying a powered aircraft."
I would be interested to hear your thoughts once you have read every post on this subject.