Second Epoch: 1918-1928 Solving Flight Navigation Problems brings Successes.

Herein the US Army Air Service later named the Army Air Corps (AAC) aeroplanes developed some capabilities. They could go places! Pilotage-navigation was developed into dead reckoning.  The need for ground and air navigation equipment became ever more apparent as flight time in the air and distances travel increased dramatically. Army McCook Field, at Dayton, Ohio, pilot-navigator engineers, such as Lt Hegenberger, Lt. Frank Lahm, and Lt. Billy Mitchell started to work and solve the problems of air navigation. In 1924 three Army Douglas World cruisers flew around the world. And the US Post Offices conducted across the US flights using the new lighted-rotating beacon airways system for navigation. In mid 1927, a former US Air Mail pilot, Capt. Charles Lindbergh of the Missouri-Army National Guard crossed the Atlantic Ocean solo, navigating by dead reckoning procedures all well worked out on his preflight Mercator projection map. Capt Lindbergh navigated with the aid of an inductor compass, air speed indicator, aircraft bubble levels, and a drift meter. The Army Air Corps developed some eight aircraft types in this period.

Navigator developments in this period:

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