Sure, I was referring to the fact that the main reasons for the training is due to safety requirements. In the original article it seems like the importance of

Sure, I was referring to the fact that the main reasons for the training is due to safety requirements. In the original article it seems like the importance of the safety procedures were minor compared to the director's needs. As a side-side note, several years ago I happened to be involved in a couple "normal" projects (construction) involving transporting machinery and materials via helicopter, and the guys doing the actual work, besides the helicopters pilots, the ones hooking/unhooking the loads (that we provided) followed (understandably) much, much more strict safety rules than "common" building crane operators and workers, including (much like - say - firefighters do) exercising on things like quick load release, communication (via radio), ropes/belts checks, etc. It's risky business.