Which of the following is NOT a characteristic of STARs?

The choice indicating that STARs (Standard Terminal Arrival Routes) serve only one airport is accurate in identifying a characteristic that is not true. In reality, STARs are designed to organize and simplify the arrival of multiple aircraft into a terminal area, and they can often serve multiple airports within a particular region or airspace. They help in managing traffic flow efficiently by directing aircraft from en route airspace to a specific airport, but the routes themselves can be used by various aircraft approaching different airports as they funnel into the terminal area's airspace.

The other options are indeed characteristics of STARs. They expedite arrival procedures by providing defined routes that help manage and sequence arrivals efficiently. STARs also depict preplanned arrival procedures, which offer pilots a structured way to descend and line up for landing. Additionally, they funnel traffic into one-way corridors, aiding in maintaining safe distances between arriving aircraft as they approach their destination airport.