My .02...1. substantiated To support with proof or evidence; verify: substantiate an accusation. See Synonyms at confirm.
2.
a. To give material form to; embody.
b. To make firm or solid.
3. To give substance to; make real or actual.
Which means someone actually did this and with their experience/abilities with that aircraft on that given day this was the culmination of pilot ability and aircraft performance. Much like Shawn said. I am reasonably sure if VF was asked to submit a "substantiated" example it will be a bit higher. Just my opinion anyway.
Last edited by before landing check list; 31st Mar 2013 at 01:22.