Definition
An advisory phrase used by a pilot to inform air traffic control that the aircraft's fuel supply has reached a state where, upon reaching the destination, it can accept little or no delay. It is not an emergency declaration, nor does it imply a need for priority handling, but it does indicate that an emergency situation is possible should any undue delay occur.
Plain English
A pilot tells ATC 'minimum fuel' to let them know the aircraft is getting low on fuel and cannot afford to be held up before landing. It is a heads-up, not a request for special treatment, and not a declared emergency.
Context Anchor
Used in radio communication with a controller when fuel is becoming tight but the pilot has not declared an emergency.
Derivation
Minimum comes from a Latin word meaning “smallest.” In this phrase, it points to the smallest practical fuel cushion left for extra delay, not simply the lowest number on a fuel gauge.
Why Pilots Care
It alerts ATC that the flight needs priority handling where possible to prevent a true fuel emergency from developing.
Grounding Statement
Minimum Fuel means the flight can keep going as planned, but it cannot safely absorb much more waiting or extra distance.
Intuition Check
Do not read “Minimum Fuel” as “I am out of fuel” or “I automatically get priority.” It means fuel is low enough that further delay could turn the situation into an emergency.
Example Sentence 1
Approaching the destination after extended vectors, the pilot advised ATC, 'Cessna Three-Four-Alpha, minimum fuel.'
Example Sentence 2
Declaring minimum fuel allowed the tower to clear the runway quickly for the arriving aircraft.