Definition
An ATC instruction used after radar vectors to advise a pilot that they are responsible for their own navigation. The pilot must navigate using onboard equipment to follow the assigned route, course, or procedure, and is no longer being steered by controller-issued headings.
Plain English
ATC is telling you that you are now back in charge of getting yourself where you're going. Stop following their headings and start flying your own route again using your own navigation.
Context Anchor
Heard on the radio after ATC has been giving heading instructions, often for traffic spacing, weather avoidance, or getting the aircraft onto a route.
Derivation
Resume comes from a Latin word meaning “to take up again.” Navigation comes from older words connected with guiding a ship. Together, the phrase means the pilot takes back the task of guiding the aircraft along the proper route.
Why Pilots Care
It returns route flexibility to the pilot, often allowing a more direct path that saves time and fuel while still requiring adherence to the cleared route and altitude.
Intuition Check
Do not take “Resume Own Navigation” to mean “go wherever you want.” It means stop following the temporary heading ATC gave you and return to the route or procedure you are supposed to fly.
Example Sentence 1
After being vectored around a thunderstorm, the controller said, 'Cessna 12345, resume own navigation, direct destination.'
Example Sentence 2
Once clear of the weather, the pilot was told to resume own navigation and proceeded to the destination airport.