High Angle Rescue Highline Systems - Twin Track - Floating W - English Reeve - Norwegian Reeve 

Building single track and twin track highline systems with an elevator (English Reeve and Norwegian Reeve)
Highline systems are a category of high angle rescue known as tensioned rope rescue systems. The Norwegian and English Reve are the most common type of " elevator " used when constructing highline systems that require a vertical component.
High angle highline systems using twin track lines with need an equalizer such as a floating W