Wow, thanks for the fast reply man,I understand what your saying, and i know it uses gps so thats a good point that it doesnt need the self checking.But still, you can go to the tune page, set a frequency there and then you see it changing in the RMU. (meant the RMU in the first post as well not the RMI)Another thing is if you add a waypoint in your Flight plan, or go Direct TO and then a VOR station, it gives you all the info on the nav screen like the radial your on and such things, does it get that info from the gps as well (witch ofcourse is possible) ?and eh.,, sorry about the sig and name, im reading this forums for like 4 years now or something, but actually never posted before :(