1
the separation of two aircraft in horizontal space by time or distance if the aircraft are following the same route and are not laterally separated.
2
the distance between two aircraft in vertical space or difference in altitude.
3
a permission by air traffic control for an aircraft to land or take off using a prescribed runway space.
4
the distance between two aircraft in horizontal space when the two aircraft are following parallel courses.
5
a service through which controllers on the ground direct both taxiing and in-flight aircraft in the area.
6
the division of air traffic control that clears aircraft for landing and takeoff and ensures that separation always exists on runway surfaces.
7
a person who works in air traffic control and directs aircraft.
8
all aircraft that are active in a particular area at a particular time.
9
an accident in which two people or objects are too close together and strike one another.
10
the smallest amount or distance allowed.
11
to tell someone what to do.
12
a sensory system that identifies the position, direction, and speed of an aircraft or other object.
13
an informational (rather than instructional) advisory that air traffic control may provide to aircraft.
