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HANDBOOK OF MAGNETIC COMPASS 



athwartship across the compass, thus providing compensation for the 

 two horizontal components of the degaussing field. 



The (H) , (B) , and (C) coils are to be likened to the heeling magnet 

 and the B and G semicircular magnets respectively, as in normal 

 adjustment. Compensation is also achieved in a fashion similar to 

 normal adjustment by adjusting the (B) coil currents v^^hen the ship is 



FiGUKB 40. — Compass compensating coils (type "B" modified) mounted on merchant type 



binnacle. 



on east or west headings and by adjusting the (C) coil currents when 

 the ship is on north or south headings. Several separate windings 

 are available in each coil so that they may be used to correct for similar 

 component effects of different degaussing coils. 



