Years ago, the French postal system used to use the Fokker F-27/Fairchild FA-227 on overnight mail delivery. The landing limits were 50 and 1/8 or some such figure - shades of Down East International - so the VIBAL system may have something to do with that. They carried 3 fully qualified Captains, one of whom sat in the jump seat. They basically drove the aircraft down to the ground on the glideslope, and the jump seater made the decision to either land or go around. Worked a treat. I think the Fairchilds were traded for ATR's. Dunno if they still have 'em.