Very much looking forward to the documentary. I did not realize that they had that much help from below with navigation. I read an interesting excerpt about female pilots of the day with my students and the challenges with navigation that often occurred, even during land-based races over the continental United States. I live on an island in Southeast Alaska currently (actually moving to Japan in a month) and we frequently have to take float planes and bush planes to "get out of town." Some are "instrument rated," but most are small 4 seater planes that are not allowed to fly if there is any threat of weather or the fog is too low. That being said, there are still plenty of crashes that occur throughout the state due to challenging terrain and navigation.