Elementary Manual for the Deviations of the Compass in Iron Ships: Arranged in a Series of Questions and Answers, Intended for the Use of Seamen, Adjusters of Compasses, and Navigation Schools. And as an Introduction and Companion to the Admiralty Manual for the Deviations of the Compass
... TYPES OF IRON PRODUCING QUADRANTAL DEVIATION . 53 In these figures , + a may be considered to represent masses of ... deviation ― -a - e + e " " 99 - negative positive negative " " " " As a positive quadrantal deviation exists in all ...
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