Aeronautics may be divided into three main branches comprising Aviation, Aeronautical science and Aeronautical engineering. Some institutions differentiate between aeronautical and astronautical engineering. Armstrong graduated with a Bachelor of Science degree in Aeronautical Engineering in January 1955. He completed his schooling there, gaining a bachelor's degree in Aeronautical Engineering. Enjoyment of a 1913 air show inspired interest in aeronautical engineering. He was enrolled at The Georgia School of Technology in the Aeronautical Engineering program. He graduated in 1934 with a B.S. in aeronautical engineering. In 2008 he graduated from Baltic State with a masters degree in Aeronautical Engineering. Others work as pilots and aeronautical engineers with local airlines. It was designed by aeronautical engineer Donald A. Hall. Yasuda was at the time director of the Army Aeronautical Department's Technical Research Institute. It is, by international treaty, the official language for aeronautical and maritime communications. She was born in San Diego, California, the daughter of an aeronautical engineer. Packard also made large aeronautical and marine engines. Isogonic lines are also shown on aeronautical and nautical charts.