The King Air C90 EFIS is designed to display two simultaneous navigational sources as either a NAV Source or a BRG Source.
Unfortunately, the BRG Source is not displayed except when it’s an ADF source. If you select VOR2 as your NAV Source (or FMS1) and VOR1 as your BRG Source, ONLY the NAV Source will be displayed. The bottom line…it’s impossible to tune two VORs and display both for navigation. This makes navigation considerably more difficult then it was designed to be.
Thank you for your help. 😺