Re: [Twoply] how bout a list of things base jumpers agree on ...
"TWOPLY QUOTE
9. Routing the control lines outside the rings on the risers and outside the slider grommets for slider down.
It's been a while but I do remember someone jumping slider down with the control lines through the riser rings. I was new at the time and he was vauge as to his reasoning. Maybe he is here reading these?"
No he's not reading this....he's on the list (but not for a rigging error).
The rationale was:
there is some probability of making a mistake changing from slider up to slider down if you misroute one or both of the lines through the rings. The consequence of such a mistake is high and potentially unsurvivable - offheading/line twists and object strike/slider hang up streamer. There are lots of stories of people making mistakes like this, mostly getting away with it, sometimes not (I've seen it happen and stuffed up once myself)
On the flip side the probability of a slider down tail gate line over is (almost) zero; the consequence obviously is a spiral in (which will seriously mess you up but probably not kill you).
So on balance it
appears the risk equation favours always keeping lines through keeper rings IF you change configuration (Slider up/down) on a regular basis.
For what its worth I always use the line mod slider down.
ps for me risk = probability * consequence