Reference the posts about "noise abatement". Airlines and manufactures spent sheds of money on technologies to reduce noise. We had Stage I, II, and III and now further certification standards for the newest jets. But the noise abatement programs, ridiculous rules and noise monitors continue on as if we were all flying JT-3D and Conways. I had mistakenly thought the technololgy would eliminate the silliness of the Sixites and Seventies. Just proves a government project once in motion, obeys the Law of Inertia.
GF