Definition
The fix that marks the start of the intermediate segment of an instrument approach procedure. The intermediate segment lies between the initial approach fix (IAF) and the final approach fix (FAF), and is where the aircraft is aligned with the final approach course, configured, and slowed in preparation for the final descent to the runway.
Plain English
A specific point along an instrument approach where the middle part of the approach begins. By this point, the aircraft is being lined up with the runway and getting ready for the final descent.
Context Anchor
Seen on instrument approach charts, flight management systems, and GPS approach sequences.
Derivation
‘Intermediate’ comes from the Latin intermedius, meaning ‘in the middle.’ A ‘fix’ in aviation is a defined geographic point. So an Intermediate Fix is simply the point that marks the middle stage of the approach.
Why Pilots Care
It marks the point where the pilot transitions to a stabilized descent and alignment for the final approach, supporting safe and predictable sequencing into the landing.
Intuition Check
“Fix” does not mean a repair here; it means a defined navigation point. “Intermediate” does not mean unimportant; it means the point sits between the early and final parts of the approach.
Example Sentence 1
Crossing the intermediate fix, the pilot reduced speed and extended approach flaps in preparation for the final descent.
Example Sentence 2
After passing the IF the crew configured the aircraft for the final approach segment.