The Artillery Information Service has available for the location of new enemy batteries and for the identification of old ones (a) aerial observation by airplane, (b) aerial observation by captive balloons, (c) terrestrial observation by (1) the...
These instructions are published for information and guidance of personnel responsible for organizational maintenance of the computer, gun direction M18.
The purpose of this summary is to compile, consolidate and present useful data to commanders and staff officers in such a manner as to be of maximum use in planning and management.