This book is included in the Military Field & Training Manuals section.
PREFACE THIS work has been undertaken in the hope that it may prove of assistance to officers in the Royal Naval Air Service, as it condenses into a small compass all the subjects in navigation they are required to know. A. E. DIXIE. NAVIGATION SCHOOL, PORTSMOUTH. March, 1917. CONTENTS CHAPTER I Elementary magnetism. The earth's effect on a compass needle. Definitions Various methods of making magnets Alloy used in making magnets. Effect of temperature on magnets. Effect of magnetism on hard and soft iron. Permanent magnetism and its effect. Sub-permanent magnetism, its cause and effect. The effect of a magnet 'end on' and 'broadside on'. CHAPTER II The magnetic compass. Liquid used in a compass. To remove a bubble from a compass. Remarks on placing a compass. Features essential in an aeroplane compass. Magnet block. The effect of 'banking' on a compass. CHAPTER III The analysis and adjustment of deviation. The various coefficients. Analysis of a table of deviations. CHAPTER IV The practical correction of a compass. Methods of swinging. Marking out a flying ground for swinging. CHAPTER V Correcting courses. Naming deviation. Rules for getting the correct bearing from the bearing tables. Final notes. CHAPTER VI Meteorology. Types of weather. Cloud formation. Fog formation. Synoptic chart. Dunboyne's weather report. CHAPTER VII General weather in the British Islands. Storm signals. Beaufort's system of weather notation. CHAPTER VIII Forecasting by solitary observer. CHAPTER IX Astronomy. Sketches of the important constellations. Notes on time. How to find the time of sunrise and sunset, and moonrise and moonset, and the true bearing at each. Explanation of the various tables. CHAPTER X Admiralty charts. Theory and construction of the gnomonic chart. Theory and construction of the Mercator's chart. How to lay off a course. To measure distance CHAPTER XI To construct a scale of longitude for any plan. Conventional markings on a chart. Use of celluloid protractor. To allow for drift due to wind. Course necessary to steer to intercept hostile aircraft. Lights, where to find particulars. Description of the various kinds. CHAPTER XII Fixing positions. CHAPTER XIII Ordnance maps. Conventional markings. Use of squared maps. APPENDIX INDEX
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