Magenta Misconceptions: What Most Pilots Don’t Understand About RNAV Glidepath Capture

So where do you get critical information? And do you choose the answer with the most likes?

Max Trescott

Friday, July 25, 2025 at 08:00 AM ET

Verified

Edited By:

Travis Tingle

DOCAL is the IF, and ACHOZ is the fix before the FAF. The hollow white diamond glidepath indicator will turn solid magenta at ACHOZ, the fix before the FAF. [Courtesy: Max Trescott]

Key Takeaways:

The article critiques the prevalent trend of seeking critical information on social media, highlighting how unverified advice can lead to dangerous misinformation in high-stakes fields like medicine and aviation.
It illustrates this through an aviation incident, demonstrating how misunderstandings of proper RNAV approach procedures, despite common misconceptions online, can lead to operational issues.
The author emphasizes the value of expert knowledge and diligent research, detailing his own efforts to empirically determine a crucial, undocumented detail about RNAV glidepath behavior, contrasting it with the speculative and often incorrect answers found on social media.

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Where do you get your information? Do you go to experts, or rely on what people tell you in a Facebook post?

I try not to spend too much time interacting on social media because to me it’s largely a waste of time. It can also be a huge source of wildly speculative, uninformed answers to questions that people pose. Often the correct answer to a question is in the comments, but how does one sort it from the other 95 comments that are incorrect?