Definition
The standardized actions taken by military or law enforcement aircraft to identify, communicate with, and if necessary divert a civil aircraft that has entered restricted airspace, failed to comply with ATC instructions, or is otherwise behaving in a way that warrants investigation. The term also covers the corresponding actions the intercepted pilot is required to take, including following visual signals, attempting radio contact on guard frequency (121.5 MHz), and complying with the intercepting aircraft's instructions.
Plain English
If a military aircraft is sent up to check on a civilian aircraft, both sides follow a set of standard steps. The military pilot uses signals and radio calls to make contact, and the civilian pilot has set responses they must follow, including doing what the intercepting aircraft tells them to do.
Context Anchor
Pilots encounter this term in airspace and national security discussions, especially when learning what to do near sensitive airspace or if contacted by an intercepting aircraft.
Derivation
Intercept comes from the Latin intercipere, meaning to seize or catch between. In aviation it carries that same idea: another aircraft is sent to meet you in flight and make contact before you reach somewhere you should not be.
Why Pilots Care
Correct intercept procedures prevent airspace violations, reduce controller workload, and keep traffic flowing smoothly and safely.
Analogy
It is similar to being pulled over by a police officer on the road: the important thing is not to guess or improvise, but to follow the recognized signals and instructions calmly.
Grounding Statement
Picture another aircraft moving into view near your wing and rocking its wings or giving a clear signal; intercept procedures tell you how to respond.
Intuition Check
Intercept does not mean a collision or an attack here. It means an official aircraft has met your aircraft in flight and is directing you through recognized signals or radio instructions.
Example Sentence 1
During the preflight briefing, the instructor reviewed intercept procedures and the visual signals a pilot would receive if intercepted near the ADIZ.
Example Sentence 2
Following the assigned intercept procedures allowed the pilot to enter the Class C airspace on the correct heading without further correction.