The FAA uses the term "advisory circular" to share information with pilots and aircraft operators, using "circular" in the way of "bulletin" or "newsletter" [1]

The FAA uses the term "advisory circular" to share information with pilots and aircraft operators, using "circular" in the way of "bulletin" or "newsletter" [1] I was really confused at first by your use of the phrase. I also think it is pretty funny if you didn't intend it. I would have thought what you're doing is better described as a "circular advisory" rather than "advisory circular". Cool project :) [1] https://www.faa.gov/regulations_policies/advisory_circulars/ https://www.faa.gov/regulations_policies/advisory_circulars/