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LONGMANS, GREEN AND CO.
39 PATERNOSTER ROW, LONDON
FOURTH AVENUE & 30TH STREET, NEW YORK
BOMBAY, CALCUTTA, AND MADRAS

1918
All rights reserved

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PREFACE TO NEW EDITION

This work is designed to meet the special requirements of officers of the Merchant Service, and to be a complete TextBook on Navigation, etc., for the general student.

Candidates for Board of Trade Certificates will find in it all that is needed to cope with the new regulations for the Examinations of Mates and Masters, from the lowest to the highest grades, as regards both practice and principles.

The new features in this edition are

(1) Rearrangement, by which the proofs of the various problems are inserted at the beginning of the separate chapter instead of being collected in one chapter at the end of the book. This gives the student a better chance of comprehending each problem.

(2) All the astronomical examples are fresh, the necessary rules are given for working them, and, where possible, an example is worked direct from the figure, without using special formula; this will be found of great assistance to those contemplating going in for the “extra” examination.

(3) The necessary elements from the Nautical Almanacare embodied in the book in the form found in the “N.A.," and so will afford as good practice in extracting the data as the possession of the Almanac itself.

(4) The chapters on TRIGONOMETRY have been entirely rewritten, and the student is shown how to construct both Plane and Spherical Triangles to scale.

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