COMPENSATION RECORDS 



103 



not necessary. In case of doubt as to this procedure, it is better to 

 remove the equipment. 



If the degaussing coils are secured improperly^ it may be observed 

 that the compass does not settle back to the same undegaussed read- 

 ing. This is due to the fact that the subpermanent magnetism of 



uss^ELASH- 



COMPASS MflKFR Ritchie 



KflVY DEPARTMENT BUREAU OF SHIPS 

 COMPASS COMPENSAT ING COIL DATA 



R0V. I May, I 

 (To tie slopledto ship's CC Instruction Manual) 



I orflTiriN N.O.B., Horfolk, Va 

 SERIAL NO 3520 L!_ .DESIGNATION _Siandard. 



DATE _Jaiu_L,_JL2U- 



BINNACLE MAKER Rltchle , MARK YII ^ PDtllTinN Fly.Br. Fl INHFRS BAR LOCATION .Eora LENGTH _121L 



DECAUSSING, COILS Mj F, Q, & A , cONTRni Field Rheostat of Dej^annsinr- Gennrntor 



C.C. COILS TYPE "G" .SERIAL N0.__=____, VOLTAGE ?!IIPPI Y Xi.C. GpnfirAtnr fPiill V.^U.3gg) 



INSTALLED by: N.N.S.& DP Co. 



-DATE 9/Xi/l3 ^ MANUFACTURED RY Amconda 



TYPE A CONTROL BOXES . 



.MOUNTED ON BINNACLE/ BULKHEAD, 



R"1 kVn^'-^d 



(Quantity) 

 OBSERVED DEGAUSSING EFFECTS BEFORE COMPENSATION 



* DG current in 4 and 5 should be maximum setting for any zone as specified in DGP 40 svles of Degaussing folder. 



COMPENSATION OF COMPASS COILS DOCKSIDE | X| 



FINAL I j 



(Adjuster) ' (Novy Yard or District) 



« n Include under remorks, detoils of any special equipment such as Type'A" Heeling ond special difficulties such os hysteresis. 



FiGDEB 55. — BuShips Form No. CC-1. 



the ship's hull has been temporarily changed by the excitation of de- 

 gaussing. Such a residual magnetism can generally be eliminated 



