This illustration depicts the actions involved in an airplane trip as an arrow in the shape of the letter U, which various stages of the trip marked along its trajectory. The U begins as a light blue and transitions at the halfway point to a dark blue. Tracing this U shape from the top left, and following it down and to the right, we see the following events:

• Ticket (purchase)

• Baggage (check)

• Gates (load)

• Runway takeoff

• Airplane routing

Once we reach the bottom-most part of the U, we see again: Airplane routing.

And once the U shape curves upwards, we see, from top to bottom:

• Airplane routing

• Runway landing

• Gates (unload)

• Baggage (claim)

• Ticket (complain)