Global reserve is the reserve rules when a plane is used for global flights. Typically widebody planes, but the guppy is going to somewhere that qualifies now. It’s being crewed out if cle at the moment, so cle guppy is considered global reserve. I can’t remember the exact definition of global, but Europe and Asia qualifies. Can’t remember if Deep South America does. Different rules, the main one is there is a 6 day block of hard days off that can’t be moved for a trip. Rest of the days off can be rolled for a global trip.