TABLE OF CONTENTS 



Part I.— MAGNETIC^ ADJUSTMENT 



Chapter I'age 



I. Procedures for magnetic compass adjustment (check-off list) 1 



II. Magnetism 7 



III. Theory of magnetic compass adjustment 15 



IV. Typical deviation curve and the estimation of approximate co- 



efficients 29 



V. Ship's heading 35 



VI. Azimuths 43 



VII. Practical procedures for magnetic compass adjustment 49 



VIII. Corrector effects — Interactions between correctors 61 



IX. Transient deviations of the magnetic compass 71 



Part XL— DEGAUSSING COMPENSATION 



X. Procedures for degaussing compass compensation (check-off list)-- 75 



XI. Degaussing compass compensation 83 



A. General principles 83 



B. Compass coil installations 85 



C. Wiring J 91 



D. Compensation 97 



E. Operation 101 



XII. Compass compensating coil and control box data 105 



XIII. Compass compensating coil effects 107 



Part XXL— MISCELLANEOUS 



XIV. Compass records and reports 111 



XV. Use of the dip needle for heeling adjustments - 115 



XVI. Use of the horizontal force instrument 119 



XVII. Slewing of spheres 121 



XVIII. Slewing of the Flinders bar - - 123 



XIX. Remote reading compasses 125 



SUGGESTED COURSE OF STUDY 



Appendix A. Outline 129 



Appendix B. Bibliography 133 



Appendix C. Problems , 134 



Appendix D. Answers to problems 138 



Index 143 



