Transactions Society Naval Architects and Marine Engineers, Vol. 30, 1922. Plate 6 
To illustrate paper on “Automatic Steering,” by Elmer A. Sperry, E. D., Member. 
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Fig, 9. - Simultaneous record of ship's heading and helm angle by 
specially magnified quick moving reel for studying effects 
of different helm angies and anticipation, Each step in 
all magnified records of heading equals one sixth of a 
degree, 
Fig. 10. -Simultaneous record of ship's heading and helm angle when 
steering with magnetic compass, portraying graphically 
the power-consuming factors in constantly applying large 
helm angles with best steering possible by magnetic. 
