Y'All,
The ILS existed in 1930 much as it is today. But bureacratic rules required
zero-zero performance for government financing. It was not until weather
and operational conditions successfully killed more airmen than all combat
opereations that reason and logic allowed the military use of the ILS.

I am in the process of composing a technical paper that I hope will
give the 'new' FAA a jump start in a safety program that will break
all existing safety records in most major categories. More another time.
Gene Whitt