What is an IFR clearance?

• A. The route, altitude, and time that ATC clears a flight for
• B. A weather briefing for arrival
• C. A ground taxi instruction
• D. A maintenance notification

Answer: (A)

An IFR clearance is the formal authorization from ATC that tells you exactly what flight path you are cleared to fly under instrument conditions. It specifies the route you’ll follow, the initial altitude you should maintain, and any timing or routing constraints. This clearance is what allows a flight operating under IFR to enter and navigate through controlled airspace safely and in coordination with other traffic. Without this clearance, an IFR operation isn’t authorized in the controlled environment.

Weather briefings, while important, are separate preflight information and not the authorization to fly. Ground taxi instructions come from the ground control system for moving on the airport surface, not the airborne routing and altitude your flight is cleared to follow. Maintenance notifications relate to aircraft condition and operational status, not to the approved flight path.