APPENDIX C 

 PROBLEMS 



PROBLEM 1 



A. Analyze the following deviation curves for the approximate coeflScients. 

 Assuming that these are actual deviation curves, show how this analysis could 

 be utilized to make necessary corrections on the appropriate headings, one at 

 a time. Show anticipated residuals on all headings, after each correction has 

 been made. 



(1) Standard compass: 



000°— 6. E. 



045° 



1. 5 E. 



090° 8. W. 



10. 5 W. 



2. W. 



4.5 E. 



4. E. 



4. 5 E. 



135" 



180° 

 225° 

 270° 

 315° 



(2) Steering compass: 



000° 8. W. 



045° 2. 5 W. 



090° .. 11. E. 



135° 16.0 E. 



180° 4. OE. 



225° 4. 5 W. 



270° : 3.0W. 



315° 3. 5 W. 



B. Assume that the standard binnacle has no correctors on it. State what 

 correctors you would employ and how you would place them in order to remove 

 the coeflScients of deviation. 



C. Assume that on the steering binnacle you have correctors as follows : 



Fore-and-aft magnets, red ends aft. No Flinders bar. 



Athwartships magnets, red ends port. 2-7" spheres at 12.5". 



State how you would adjust the existing correctors to remove these co- 

 eflScients of deviation. 



D. State what type of ship's magnetism would cause each type of deviation 

 represented by the coeflBcients of the deviation curve on the steering compass. 



PROBLEM 2 

 [Fill in the blanks] 



134 



