That works great for me with low altitude missions. I build my plane launch, go to map view, click on the destination, and when I return from map view there's an icon on my navball. I tried that for a high altitude mission today and after building my racket and going to map view and clicking on the destination, I didn't get anything on my nav-ball. Is there something different about the way that I need to select destinations when piloting a rocket vs a plane?