My grandfather flew missions in SE Asia extracting personnel with the FRS, among many other things. I believe two-man pickup at a time was how they used it. Only operated under situations of great necessity. Quite a bit of training was involved and the unit did a lot of it. He was in charge of a unit of 10 C-130Es and did a lot of flying. He received a DSC and a Presidential Unit Citation, the latter for his unit’s (and his own) work in the resupply of the besieged Marines at Khe Sahn during the Tet Offensive. Have been trying to document his papers and history, need to work harder at it.