Hand-book Of The "double" Slide Rule: Shewing Its Applicability To Navigation. Including Some Remarks On Great Circle Sailing, And Variation Of The Co

Before the advent of electronic calculators, the double slide rule was an essential tool for maritime navigation. In this handbook, William Henry Bayley explains how to use this ingenious device to solve a wide range of navigation problems. Through detailed illustrations and clear explanations, Bayley shows readers how to master the art of celestial navigation.

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