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post #14 of Old 04-30-2013
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Re: Jackline system

* The Tybloc will reduce the line strength to about 2000 pounds, based on the testing I've seen. Probably OK for a short tether, but too low for a tight jackline.
Sail Delmarva: Sample Calculations for Jackline Stress and Energy Absorption

* Seems too fiddly to use in rough conditions. I would favor short tethers (3 feet) and conventional jacklines, even on a 27-foot boat. The adjustable tethers I might like. I use dual length (3'/6') tethers and they suit my boat fine, but I would go shorter on a smaller boat, perhaps 2'/4'.

* Look at the Kong Tango. Tango Carabiner : Rock Climbing Gear : I've been using these for a while. Fast.

I've used Tyblocs climbing (hauling and to prevent slack from sliding back when simulclimbing), but they really aren't meant to take fall impact. No accender is.

(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber

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