Here you go, straight from the UKAIP (which is free to download), here's a link and go ENR1.6.2 Para 2.1(c)
http://www.ead.eurocontrol.int/eadba...2012-04-05.pdf
Hardly classified is it? Also taught to PPL students throughout the world - and probably on Trial Lessons. Also, I'm sure that terrorists around the world have access to the internet, search engines and research via textbooks - they don't all live in caves you know!
Some of you chaps are often too keen to jump on the opsec 'outrage bus'!
LJ