By Kearny Photo Service
This photograph of 212 aeroplanes flying over San Diego has a number of interesting points for the student of aerial laws and regulations for
air traffic. First, it shows that two hundred aeroplanes will fill the sky of a city, and unless well directed by air traffic regulations would create
confusion and lead to accidents: Second, the fact that the flight of all these aeroplanes was directed from the ground by radio-telephone indicates
that radio-telephony can be used as a means of communication between officers in charge of enforcing traffic regulations and aircraft: Third, it
makes evident the necessity of adopting the system of "altitude levels” and “one-way” airways, proposed and adopted by the Aero Club of Amer-
ica, the Aerial League of America, the Aerial Touring Association and other national aeronautic organizations.