At the edge of the city you can find several large wooden docks standing twenty feet in the air. The foremen rushes over to the open bay and grabs the controls as an airship comes in for a landing. You hear the gears underneath the docks turn as the large support structures in the bay move into place to accept the ship.
The docks have three bays, each with there separate controls to the supports below. A storage area can be found on the elevated dock that is walled to prevent goods from falling twenty feet onto the cobblestone below.
A small building is found at the entrance were workers can get there schedule for the day and travelers can attempt to buy passage.
Video of my process: https://youtu.be/XHBDX7ORNOY