The Smithsonian has (had?) a great exhibition on the history of navigation techniques. Some content is available online too [1], including this newsreel showing

The Smithsonian has (had?) a great exhibition on the history of navigation techniques. Some content is available online too [1], including this newsreel showing some navigation techniques [2]. [1] http://timeandnavigation.si.edu/ http://timeandnavigation.si.edu/ [2] http://timeandnavigation.si.edu/multimedia-asset/clipper-pilots-train-cadets-in-navigation-run-time-055 http://timeandnavigation.si.edu/multimedia-asset/clipper-pil...