OK. So I just got RCV3 today and in general, I was having a lot of fun with the product, until I tried to fly a direct GPS routing between EDDF and KIAH. When I tried to do that, RCV3 maps the route as a southerly route over Spain and the Azores, which is so not what this routing should look like. Direct Route between EDDF and KIAH should run just of Greenland and along the East Coast down into IAH. I read an earlier post, that suggested trying flex DP, which I tried to no avail. Then, I tried the "trick" with having the slave set as Nav mode and to have HDG hold and ALT hold. Also did not work. I constantly got reprimanded by RCV3. The last thing I tried that was semi-successful, was to include an extra checkpoint, which got rid of the controlers sending me in the wrong direction, but it did not let the AP Otto fly the plane in the correct routing along the GPS. Please somebody help me. It just can't be that nobody would have tested that and even less that your definition of a direct line between two points across the globe can chart such an incorrect track.SP

Steffen,RC does not handle Great Circle navigation very well, nor should it for that distance.For that distance you need waypoints of 500 miles or less. 300-400 is best. If there are none, add them. There are several good NAT (North Atlantic Track) sites with the daily routes shown with all the waypoints. If you don't want to get that complicated, just add waypoints at 400-mile intervals. You still won't fly the exact line, but close enough so as not to unnecessarily waste fuel.And yes, this has been discussed several times.