Network.
Scheduling and its gates, flight numbers, slots, curfews, stations, and the map.
Scheduling gates
The seven validation gates every schedule must pass before it saves, and what each one rejects.
Flight numbers & pairs
What a flight number contains, how directional round-trip pairs work, and how to assign, edit and cancel them.
Slots & curfews
How airport capacity limits and night closures constrain your schedule, and how slot-ledger worlds turn slots into tradeable property.
Map lenses
The world map's three lenses and its layers: reading your network, the competition and the fog-shrouded demand at a glance.
Stations
How stations come into being, what the Stations table tracks, and how to read an airport's detail page.
Hubs, banks & connecting time
What minimum connecting time (MCT) is, when two flights actually connect, and how to build a hub bank that feeds the most through-passengers.