We usually use harnesses to rescue the people from dig, lakes and mountains (from height). This one is the old but effective. This is modern era and science produce new and safe equipments for the rescue man.
Tripod is one of them. It used for many years but unfortunately few people know about it and how to use it? Let us to tell about its feature.
A tripod is a portable three-legged frame, used as a platform for supporting the weight and maintaining the stability of some other object. A tripod provides stability against downward forces and horizontal forces and movements about horizontal axes. The positioning of the three legs away from the vertical centre allows the tripod better leverage for resisting lateral forces.
Expressions are more effective than words.
So you can better know about it from the pictures.