Definition
The radio frequency on which a pilot first establishes communication with an air traffic control facility or other ATC service when entering its area of responsibility or beginning a new phase of flight.
Plain English
The frequency you tune to when you first call up a controller, before they hand you off to anyone else.
Context Anchor
Seen on instrument charts, procedure instructions, and preflight planning notes when a pilot needs to know which controller to call first.
Derivation
‘Initial’ comes from the Latin initialis, meaning ‘at the beginning.’ Here it points to the very first frequency you use to reach a particular controller — before any further frequency changes happen during the flight.
Why Pilots Care
Using the correct frequency on first call prevents missed communications and keeps the flight on its published routing without delay.
Intuition Check
Do not read “initial contact” as just any early radio call. Here it means the specific first frequency to use for contacting the proper control facility in that situation.
Example Sentence 1
Before departure, the pilot noted the initial contact frequency for departure control from the airport diagram.
Example Sentence 2
After the handoff, the initial contact frequency was 126.8 and the pilot checked in immediately.