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HANDBOOK OF MAGNETIC COMPASS 



components of coil compensation, as discussed above. The heeling 

 (H) coil about the binnacle creates its effect vertically so as to com- 

 pensate for the vertical component of the degaussing field. The wind- 

 ings of the "G" and "K" coils which create horizontal compensating 

 fields are arranged so as to produce these fields on the two inter- 

 cardinal axes, rather than on the fore-and-aft and athwartship axes. 



Figure 42. — Compass compensating coils (type "G ' modified) mounted on shelf type 

 binnacle and plywood pedestal. 



The intercardinal coils on the NW./SE. axis are termed the NW./SE. 

 coils, and the others are termed NE./SW. coils. The "G" coils should 

 be carefully and rigidly mounted at the intercardinal positions with 

 their axes perpendicular and on a level with the compass card. The 

 "K" coils are constructed 90° apart, but the assembly must be mounted 

 with the plane of the heeling coil approximately on a level with the 

 compass card. The centerline of the intercardinal "K" coils will be 



