I talked to Darren, in sales - take it for what its worth.
The 3/16th is being used as replacement line for the cables on ATV's.
The heavier editions of this rope are actually mandated by the Rock Crawlers at their get togethers. They will not allow steel anymore.
It has very little snap back.
Darren talked to one guy who was next to a rope that broke and the force he experienced was equivalent to a towel being snapped.
Darren witnessed a rope that was cut by a sharp rock and it came back several feet and slowed quickly then dropped.
The reason this stuff is getting mandated
in some areas is because of its safer characteristics with regard to snap back.
The 3/16th stretches .96% under a 30% load.
So a hundred foot of 3/16th rope under a 1600 pound load would stretch 1 foot.
Shipping from Seattle to Central Oregon would be under 20 bucks for a 600 foot spool.
There are editions of this fiber that are even stronger, (have strengths over 21,000 pounds), and far more abrasion resistant.
Darren said the rope is very pliable
He thought that in an application as a river rescue the sand concern, with appropriate cleaning, if only used once a year it would be no problem.
Pulling it over sharp rocks would be another story.
Here is what the rope looks like being handled.
Here is a rope being broken on a stump pull.
It did move quickly but didn't look powerful. I'm not sure how fast it would have taken a figure 8 or biner with it.
some humor for now