Aerodromes, Airspace and Air Traffic Services
This domain tests your mental map of the airspace system and the services inside it. Know the classes of airspace and what each permits: whether a clearance is required, whether VFR is allowed, and what separation is provided. Understand controlled, uncontrolled and special-use airspace, the meaning of control zones and control areas, and the difference between a clearance (an authorisation) and information (advisory). Candidates should be able to explain the services ATS provides - air traffic control, flight information, and alerting - and which service applies in which airspace.
Aerodrome knowledge includes movement areas, declared distances, obstacle limitation surfaces, and the signals and markings used to convey instructions to aircraft and vehicles. Know the meaning of aerodrome traffic and the responsibilities of the aerodrome controller versus the ground controller. Be able to read the concept of a clearance limit and the requirement to read back safety-related instructions.
Traps: assuming a flight information service provides separation (it does not); confusing a clearance with permission to deviate from the rules in an emergency; and questions that treat all controlled airspace as identical when VFR minima and clearance requirements differ by class. Another common trap is treating an ATC instruction as absolving the pilot in command of responsibility for terrain clearance and safe conduct of the flight.
Rule of thumb: clearance = permission; information = advice; alerting = response. If a service is not providing separation, do not assume separation exists.
Worked example: In airspace where only flight information service is provided, two IFR aircraft receive traffic information about each other. Neither is separated by ATC; the pilot in command remains responsible for collision avoidance and must act on the information.