Hi Peter & All, I performed a simple Google search on "navaid class" & found a couple of sites that have some of what your looking for: http://www.faa.gov/atpubs/ATC/Chp4/atc0401.html http://www.avsim.com/pages/0100/dauntless1/KMSO-VOR.htm Vy 73 de Mike KB6WFC __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com