150 HANDBOOK OF MAGNETIC COMPASS 



T 



"T" type compeiisaing coils — 117, 108 (2 or 3). 



Terrestrial magnetism — 7. 



Time— 60-64. 



Transient deviations — 103-106. 



True meridian — 9. 



u 



Unsymmetrical horizontal soft iron — 2-5-28. 

 Unsymmetrical magnetic fields — 102, 32. 



Variation : 



Definition — 9, 44. 



Use of— 44, 46, 57, 59. 



Chart— fig. 6. 



Annual change — 9. 

 Vector analysis— 19, 1.39, 113. 

 Vertical soft iron— 14, 21, 30. 

 Voltage limits on CCC— 129. 



W 



Watch correction on L. A. T. — 64, 65. 

 Wiping— 106. 

 Wiring of CCC : 



Schematic — 118. 

 Control box— 119. 

 Connection to degaussing — 120. 

 Interconnection : 

 Type "B"— 120. 

 Type "G"— 120. 

 Type "K"— 120. 

 Type "T"— 120. 



Z 



Zone time — 63. 



o 



