Plain English Meaning

A quick way of writing down ATC instructions using short symbols and letters instead of full words, so a pilot can keep up with what the controller is saying and read it back correctly.

Full Definition

A standardized system of abbreviations and symbols used by pilots to quickly write down ATC clearances and instructions as they are received over the radio, allowing the full clearance to be captured accurately for readback and later reference.

Context Anchor

Used when copying an IFR clearance from clearance delivery, ground control, or another ATC controller before departure or during flight.