Seat maps usually indicate the basic seating layout, the numbering and lettering of the seats, the location of the emergency exits, lavatories, galleys, bulkheads and wings. They are published by airlines for informational purposes, and are of use to passengers for selection of their seat at booking or check-in. AIR CHINA AIRLINES SEATING - AIRCRAFT CONFIGURATIONS - AIRCRAFT CABIN LAYOUT - AIRLINE AIRCRAFT SEATING CHARTSĪn airline aircraft seat map or seating chart, is a diagram of the seat layout inside a passenger aircraft.