Definition
A defined area of airspace surrounding a busy airport in which an air traffic controller is responsible for separating and sequencing aircraft that have just taken off and are climbing out toward their en route course.
Plain English
A specific block of airspace near an airport where one controller handles aircraft after takeoff, guiding them safely away from the field and up to their cruising route.
Context Anchor
Seen in airport departure planning, instrument departure discussions, and obstacle-clearance descriptions after takeoff.
Derivation
From Latin 'sector', meaning 'a portion cut off'. A sector is a slice of the controlled airspace assigned to one controller, and the departure sector is the slice handling outbound traffic.
Why Pilots Care
Keeps departing traffic safely separated and moving efficiently until handed off to the next controller.
Grounding Statement
Picture the runway centerline continuing out into the sky after takeoff; the departure sector is the defined area around that initial path away from the runway.
Intuition Check
Departure sector does not mean the airline terminal area or a general compass direction. Here, it means a defined part of the airspace used after takeoff.
Example Sentence 1
After takeoff, the tower handed us off to the departure sector, who gave us a climb to 8,000 feet.
Example Sentence 2
The departure sector sequenced three jets for the same departure fix.