The Navigator's Handbook on Modern Compass Adjusting

Abstract

MR. GILLIE'S book contains within its small compass all the information necessary for those who wish to understand the factors on which the efficiency of the magnetic compass depends. Among its merits, we may refer to its simplicity; it does not require a navigator to understand the nature of the problems. Although it cannot be considered a textbook for examination purposes, it will serve as an introduction to such books. Simple explanations are given regarding the effect of the steel of a ship on the compass, how the disturbing forces are divided into 'co-excients', the means employed for making the necessary corrections, etc. The principle for degaussing installations—a matter of supreme importance in recent years—is simply explained and also their effect on the compass and the means adopted for overcoming their disturbance. Chapter 9 supplies some simple rules for dealing with compass troubles at sea, and a glossary and index are a useful addition to this highly commendable little book.

The Navigator's Handbook on Modern Compass Adjusting

With particular reference to Wartime Conditions. By John Calder Gillie. Pp. 110. (London: George Allen and Unwin, Ltd., 1943.) 3s. 6d. net.

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