Definition
The planned sequence of altitudes and altitude changes for a flight from departure to arrival, including climbs, level segments, and descents, with associated speeds and altitude constraints at specific waypoints. In an FMS, the vertical flight profile is computed and managed alongside the lateral (horizontal) route and is used to drive vertical navigation guidance.
Plain English
It is the up-and-down plan for the flight: when to climb, when to stay level, when to descend, what altitudes to hit, and what speeds to fly along the way.
Context Anchor
Seen when reviewing route and descent planning in a flight management system.
Derivation
Profile comes from the Italian profilo, meaning a side view or outline. A vertical flight profile is literally the side-view outline of the flight — what the path would look like if you drew it on paper from the side, showing height against distance.
Why Pilots Care
It lets the aircraft meet published altitude restrictions, save fuel on optimized descents, and reduce pilot workload in complex arrival procedures.
Analogy
It is like looking at a side view of a road through hills: the road may go up, flatten out, and go down. A vertical flight profile shows that same kind of height pattern for the airplane.
Intuition Check
Do not read vertical flight profile as the airplane’s left-right path across the map. It means the altitude plan along that path: climb, level flight, and descent.
Example Sentence 1
After loading the arrival, the crew reviewed the vertical flight profile to confirm the aircraft would meet the crossing restriction at the initial approach fix.
Example Sentence 2
After the ATC reroute, the crew reloaded the arrival and reviewed the new vertical flight profile before starting the descent.