Definition
A specific, named geographic point in the sky defined by the crossing of two navigation reference lines — typically two VOR radials, a VOR radial and a DME distance, or a radial and an airway. Designated intersections are published on aeronautical charts and are used as fixes for navigation, route definition, holding, and reporting positions.
Plain English
A named point in the sky created where two navigation lines cross. Pilots use it like a signpost — a precise place they can fly to, report over, or hold at, even though there's nothing physically there.
Context Anchor
Seen on aeronautical charts, route descriptions, instrument procedures, and clearances from air traffic control.
Derivation
From Latin intersectus, 'cut between' — the point where two lines cut across each other. 'Designated' means it has been formally named and published, distinguishing it from any random crossing of lines a pilot might compute themselves.
Why Pilots Care
Allows precise navigation fixes, altitude changes, and compliance with ATC clearances on instrument flights.
Analogy
It is like a named point on a map where two invisible guide lines meet. The point is real for navigation even if there is no sign or object there.
Intuition Check
Do not think of this as a road intersection or a visible crossing on the ground. In aviation, it is an officially published point in the airspace, identified by charts and navigation equipment.
Example Sentence 1
ATC cleared the flight direct to the designated intersection BOLDR, then to resume the filed route.
Example Sentence 2
Flight planning showed a course change required at the next designated intersection.