Privateaircraft occupy the lowest rung of the flight ladder.
在飞行梯队中，私人飞机处于最底层。
2
So far, the photographer has photographed more than 800 privateaircraft.
目前为止，他已经拍摄了800多架私人飞机。
3
And there are very few "fixed based operators" (FBOs), the service centres based in airports that maintain and operate privateaircraft, often on behalf of individual owners.