The purpose is to combat rope stretch; if you've got a bunch of rope above your casualty the rope that is being stretched with their weight, it will recoil when the casualty is removed from the rope...if you're using the hand ascender attached to a cowstail to perform the pick that hand ascender will recoil with the rope and potentially hang you up. Once transferred to the descender, you can remove the hand ascender and as you lower the casualty onto you (the rescuer) the rope stretch will be lowered out with nothing obstructing it. Hope that makes sense!
Fantastic explanations!
Thanks!
That was excellent, well explained, shown well. not rushed, very nice. How do I meet you lovely folks? Jim H. Portland, Oregon
Hey Jim! Thanks for the comment and we're located in Burnaby BC! Come visit for sure!
why do you do the chance over for the casually, instead of pick rescue directly?
The purpose is to combat rope stretch; if you've got a bunch of rope above your casualty the rope that is being stretched with their weight, it will recoil when the casualty is removed from the rope...if you're using the hand ascender attached to a cowstail to perform the pick that hand ascender will recoil with the rope and potentially hang you up. Once transferred to the descender, you can remove the hand ascender and as you lower the casualty onto you (the rescuer) the rope stretch will be lowered out with nothing obstructing it. Hope that makes sense!