JRB Hitch Climbing
Climbing Systems Guide: DRT and SRT Climbing Systems - Sherrilltree
Techniques to improve returning to the trunk with SRT - Petzl USA
Is DdRT really 2:1 mechanical advantage? - Climbing Arborist
Spot the mistake! : r/TreeClimbing
Double Whipped Tackle (DWT) - Rigging and roping - Arbtalk
Making DRT Easier?
Tree Climbing Basics - Educated Climber.com
Is DdRT really 2:1 mechanical advantage? - Climbing Arborist
It's Moving Rope December! — Bartlett Arborist Supply