Plain English Meaning
Always knowing how much fuel you have, how long it will last, and whether it is enough to finish the flight safely.
Full Definition
The pilot's continuous, accurate knowledge of how much usable fuel remains on board, how long that fuel will last at current and planned power settings, and how that quantity compares to the fuel required to reach the destination plus any required reserves and alternates.
Context Anchor
Used during en route flight, especially when weather, routing, winds, delays, or holding may change how much fuel the flight will use.
Why Pilots Care
Fuel exhaustion remains a leading cause of general aviation incidents; maintaining awareness prevents unplanned diversions or .