ADJUSTMENT CHECK-OFF LIST d 



5. Come to any intercardinal magnetic heading, e. g. northeast 



(045°). Correct any observed deviation by moving 

 the spheres in or out. 



6. Come to the next intercardinal magnetic heading, e. g., 



southeast (135°). Correct half of any observed devia- 

 tion by moving the spheres. 

 The intercardinal heading adjustments should now he complete, 

 although more accurate results might he ohtairved hy correcting 

 the D error determined from the deviations on aU four inter- 

 cardinal headings, as discussed in art. 38. 



7. Readjust the heeling magnet so as to remove oscillations 



of compass card, v^ith ship under rolling conditions on 

 a north and south heading (ch. XV). 



8. Secure all correctors before swinging for residual 



deviations. 



9. Swing for residual undegaussed deviations on as many 



headings as desired, although the eight cardinal and 

 intercardinal headings should be sufficient. 



10. Should there still be any large deviations, the procedure 



under "Adjustments at Sea" will have to be repeated. 

 If the resulting deviation curve is still unsatisfactory, 

 analyze it to determine the necessary corrections (ch. 

 IV and art. 87). 



11. Record deviations and the details of corrector positions on 



standard Navy Form NBS 1104 or 1105, and in the 

 Compass Record Book, NBS 1101 (arts. 89 and 132). 



12. Refine degaussing compass compensating coil adjustments 



(ch. X). 



13. Swing for residual degaussed deviations with the degaussing 



circuits properly energized (ch. X). 



14. Record deviations for degaussed conditions (art. 126). 



3. The above check-off list describes a simplified method of ad- 

 justing compasses, designed to serve as a simple workable outline for 

 the novice who chooses to follow a step-by-step procedure. The 

 "Dockside Tests and Adjustments" are . essential as a foundation for 

 the "Adjustments at Sea," and if neglected may lead to spurious re- 

 sults or needless repetition of the procedures at sea. Hence, it is 

 strongly recommended that careful consideration be given these dock- 

 side checks prior to making the final adjustment so as to allow time 

 to repair or replace faulty compasses, anneal or replace magnetized 



