Opening John Achor's document Adcock Radio Range Orientation and Instrument Approaches   Be aware that if you click on the link above from the kneeboard, you will crash fs9. There is nothing wrong with John's file, a PDF file. The fs9 Kneeboard simply will only welcome HTML files, and lets you know that in a rather dramatic fashion. So open this document to read or print before climbing into your Gooneybird.