Coffman,
welcome back. The RAF snatch system was totally different from the US Fulton Rescue and Recovery System. This was developed during the Vietnam war to pluck downed flyers from the jungle. I watched a display at Lyneham, using a dummy, and it looked horrendous. But if 'charlie' was after you it was by far the better option. There is at least one video on youtube I believe.
Our snatch was cobbled together for Op Corporate to pluck a small bag of mail etc NOT personnel ! We used the high tech method of rope strung between two poles the US used a helium balloon. The SAS used to use helium balloons as markers when we dropped to them in the jungle.
Hope this helps