Dyneema for Jacklines / Jackstays?

[Cliffhanger]

Originally Posted by thinwater

One of the big question marks for Dyneema is the very limited energy absorption capacity. No stretch means the forces are higher, .

This is a good point. After decades of rock climbing falls, I understand the importance of a stretchy rope. it is what absorbs the energy of a fall. On a boat, though, you don't want so much stretch that you end up overboard. Plus the loads should be nowhere near as dynamic as a rock climbing lead fall.

So, perhaps something half way between dynamic climbing rope and dyneema .....say double braid polyester?