Above is a picture of an original STABO rig. This webbing was developed as a method for emergency extraction via ropes and helicopters when the LZ was too small or too hot to land the chopper. This was used by SOG recon men for their cross border missions.
Developed by a few Green Berets after a few SOG men were lost using the Mquire rig, which was just a loop for a seat at the bottom of the ropes. Using the STABO harness,the recon man had both hands free and could still fire his weapon or if he was wounded, he did not have to hang on to the rope to keep from falling.
The straps replaced the shoulder straps used on the M56 web gear and kept a belt. The man’s pouches and gear was then hung off the STABO rig. When ready to be used, the straps on the back folded down and under the legs o make a secure seat. A special yoke on the end of the ropes attached to the rings on top of the shoulder and when the chopper lifted, you were pulled away.