ILLUSTRATIONS VII 



Part II.— DEGAUSSING COMPENSATION 



Figure Title Page 



38. Resultant degaussing field and its equivalent three vector components. 84 



39. Compass compensating coils, type "B" 85 



40. Compass compensating coils, type "B" modified ^ 86 



41. Compass compensating coils, type "G" 87 



42. Compass compensating coils, type "G" modified 88 



43. Compass compensating coils, type "K" 89 



44. Compass compensating coils, type "T" : 90 



45. Elementary wiring of compass coil circuit 91 



46. Type "A" control box wiring diagram 92 



47. Wiring diagram for type "B" compensating coil installation 93 



48. Wiring diagram for type "G" compensating coil installation 94 



49. Wiring diagram for type "K" compensating coil installation 95 



50. Wiring diagram for type "T" compensating coil installation 96 



51. Connections of compensating coils to degaussing systems 97 



52. Intercardinal axes 99 



53. Deflection of compass by magnets 1 100 



54. Deviation table— Form NBS 1104 102 



55. BuShips Form No. CC-1 103 



56. Correction effect curves — Type "B" flinders bar (B) coils 107 



57. Correction effect curves — Type "B" sphere (C) coils 108 



58. Correction effect curves — Type "G" coils 109 



59. Correction effect curves — Type "K" coils 109 



60. Correction effect curves — Type "T" coils 110 



61. Vector analysis of quadrantal error 121 



