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deflection very irregular; too scattered


Fig. 7 (wall chart for keeping records of (telegraphic) code progress; detail)
illustrating Notes for Communications Officers (Code Instruction), Air Service Information Circular 1:79 (June 12, 1920)
University of Illinois copy, no date of digitization

Described at p 11

“The left side designed to record sections, the middle to accommodate the roster, and the right side to record speeds. The plan carried out for recording on this chart is similar to the widely used map tack system; that is, map tacks of different colors are used to represent the names on the roster...”

epigram from “Supplementary code for adjustment of fire and for designation of location,” at p 8

13 May 2014

deflection; code instruction; scatter; tables; telegraphy