Definition
A defined airspace surrounding an airport that provides a standardized method for transitioning aircraft from the en route phase of flight to the initial approach fix of an RNAV (area navigation) instrument approach procedure. A Terminal Arrival Area (TAA) is typically divided into sectors arranged around the approach, each with its own minimum altitude that guarantees obstacle clearance within that sector.
Plain English
A piece of airspace shaped around an airport that helps a pilot get from cruising flight onto an instrument approach. It is split into sectors, and each sector tells the pilot the lowest safe altitude to fly until reaching the start of the approach.
Context Anchor
Seen on some area navigation instrument approach charts, usually in the plan view near the starting fixes for the approach.
Derivation
“Terminal” comes from a word meaning “end” or “boundary.” In aviation, the terminal area is the airspace near the airport, not the passenger building. “Arrival” means coming in, and “area” means a defined space, so the term points to a defined space used as you arrive near the airport.
Why Pilots Care
Provides altitude protection and a clear path from en route flight into the approach without gaps in guidance.
Intuition Check
Do not read “terminal” as the airport building where passengers board. Here it means the airspace near the airport where the flight is transitioning from cruise flight to the approach.
Example Sentence 1
After being cleared direct to the initial approach fix, the pilot descended to the altitude shown for the appropriate Terminal Arrival Area sector.
Example Sentence 2
Once inside the Terminal Arrival Area the aircraft was cleared to begin the approach to the runway.