Definition
A single charted fix on an instrument approach that serves two functions at once — most commonly, the initial approach fix (IAF) and the intermediate fix (IF), or the IAF and the final approach fix (FAF). When the same fix is used for both roles, a holding pattern-in-lieu-of procedure turn depicted at that fix may not be required if the aircraft arrives aligned with the final approach course within the published sector.
Plain English
One point on an approach chart that does the job of two segments. Because it counts as both, you may not need to fly the course-reversal hold if you arrive lined up with the inbound course.
Context Anchor
Seen on instrument approach charts that publish a holding pattern in place of a procedure turn.
Derivation
“Dual” comes from a root meaning “two,” and “purpose” means an intended use. In navigation, a “fix” is a known position, not a repair. The term helps because it means one known point is being used for two charted purposes.
Why Pilots Care
Recognizing a dual-purpose fix tells you whether the course reversal is required or optional. Flying an unnecessary hold wastes time and fuel; skipping a required one is a procedural violation. The fix itself is your cue.
Intuition Check
Do not read “fix” as a repair. In aviation, a fix is a known point in space. Do not read “dual-purpose” as optional. It means the same point has two charted jobs.
Example Sentence 1
Because WICKR is a dual-purpose fix serving as both the IAF and the IF, ATC cleared us straight in and we did not fly the holding pattern depicted on the chart.
Example Sentence 2
Because the same waypoint served as both holding fix and FAF, the dual-purpose fix let the crew skip the procedure turn entirely.