Birddog:
Perfect analogy---Many years ago when I used to give stage checks etc, I would pull the fuel gauge circuit breaker, and almost 90% of applicants, not notice it.
By the way---Who or what is FREDA?
Ned:
The problem was solved by having the J-hook attached to the tri-link and then the tri-link is locked and has "tell tale" stripes painted on it. It now means that rappellers have to slide the harness over their head, instead of putting it on like a jacket.