Context: Tower Control controls aircraft on the runway and in the controlled airspace immediately surrounding the airport. Tower controllers may use radar to locate an aircraft's position in three-dimensional space, or they may rely on pilot position reports and visual observation. They coordinate the sequencing of aircraft in the traffic pattern and direct aircraft on how to safely join and leave the circuit. Aircraft which are only passing through the airspace must also contact Tower Control in order to be sure that they remain clear of other traffic.

Question: Who controls aircraft on the runway?
Answer: Tower Control

Question: Who controls aircraft in the controlled airspace immediately surrounding the airport?
Answer: Tower Control

Question: Tower controllers use what to locate an aircraft's position in three-dimensional space?
Answer: radar

Question: Why should aircraft that is only passing through an airspace contact Tower Control?
Answer: in order to be sure that they remain clear of other traffic

Question: What is controlled by the pilot?
Answer: Unanswerable

Question: What does the airport use to locate an aircraft?
Answer: Unanswerable

Question: What does the pilot coordinate in the traffic pattern?
Answer: Unanswerable

Question: Who must contact the other pilot when passing through airspace?
Answer: Unanswerable

Question: What does a pilot do when there is more than one plane in the air?
Answer: Unanswerable