Glossary

Clearance

Clearance must be given to all aircraft before entering controlled airspace. This includes both public aircraft and a private aircraft hire. Clearance is the term used when allowing an aircraft to enter a controlled airspace, and it’s typically given by any kind of air traffic services, including air traffic control (ATC).

When requesting clearance to enter a controlled airspace, a private aircraft hire must file a flight plan. They must also give a minimum time period of ten minutes before making such a request. The request also needs to include the aircraft call sign and a brief statement.

Control Tower Clearance

The control tower plays a large part in most clearances. They’re responsible for approving departure clearance to instrument flight rule (IFR) flights. The ATC/control tower personnel are also responsible for an aircraft’s:

  • Ground instructions, such as taxiing, take off, and landing
  • Navigation through controlled airspace
  • Pilot and crew support
  • Collision prevention
  • Enforcement of traffic separation rules

Flying in restricted areas without the proper permissions from the control tower can be hazardous to an aircraft and its crew and passengers. However, in an emergency, the pilot in command may override the ATC’s instructions in order to maintain safe operation of their aircraft if deemed necessary.