Definition
A single charted fix on an instrument approach that serves two roles depending on how the aircraft arrives at it. When the aircraft enters the approach via that fix from a feeder route or en route structure, it functions as the Initial Approach Fix (IAF), marking the start of the initial approach segment. When the aircraft arrives via a Terminal Arrival Area (TAA) or RNAV transition that delivers it directly into the intermediate segment, the same fix functions as the Intermediate Fix (IF), marking the start of the intermediate approach segment. The dual label IF/IAF on the chart tells the pilot the fix is approved for both uses.
Plain English
A point on the approach chart that can act as either the start of the approach or as a midway point, depending on how you got there. One fix, two possible jobs.
Context Anchor
Seen on instrument approach charts next to a fix or waypoint name, especially on procedures where the same point begins the approach and also starts the next inbound segment.
Why Pilots Care
These fixes establish the proper sequence for descending and aligning with the runway while maintaining safe obstacle clearance.
Intuition Check
Do not read IF/IAF as two separate places. It usually labels one point with two approved roles on the approach.
Example Sentence 1
Cleared direct to JOLTZ, the pilot recognized the IF/IAF symbol and, because they were arriving from the straight-in TAA sector, treated it as the IF and continued without a course reversal.
Example Sentence 2
At the IF/IAF the aircraft was established on the approach course and configured for landing.