[ARC5] History and Context of the ARC-5 sets

[Jim Haynes]

Another part of the story that comes through from reading the official 
WW-II history books, the volumes on the Signal Corps, is that in the
Army the Signal Corps had the philosophy of developing whatever equipment
was needed and then putting the design out to industry for production.
The Air Corps was more interested in buying a system off the shelf -
hence their demand for copying the English air defense system equipment.

There are other instances of the Navy being ahead of the Army.  I just 
read the biography of Arthur Collins, where it says that the Navy was a
good customer of Collins pre-WW-II.  Collins tried to sell to the Army
and got the brush-off.  Later when the Army wanted to buy Collins
equipment he told them to place their orders through the Navy.
Then there is a book "America's pursuit of precision bombing, 1910-1945"
which deals with the Norden bomb sight, and how the Navy carried the
ball for a long time in this development.