Coastal Navigation Course
Chapter VII
Answers to Deviation Practice Lesson
True 
Variation 
Magnetic 
Deviation 
Compass 

1.  152° 
5° W 
157° 
7° W 
164° 
2.  190° 
4° W 
194° 
5° E 
189° 
3.  162° 
1° E 
161° 
6° W 
167° 
4.  098° 
10° W 
108° 
4° E 
104° 
5.  265° 
8° E 
257° 
19° W 
276° 
6.  345° 
4° W 
349° 
4° E 
345° 
7.  138° 
3° E 
135° 
12° W 
147° 
8.  196° 
3° W 
199° 
13° E 
186° 
9.  355° 
2° W 
357° 
2° W 
359° 
10.  222° 
4° E 
218° 
16° W 
234° 
In real life, if you calculate deviations in excess of 5° either east or west, you should first try to find the source of the unusual deviation. If it can’t be remedied by removing the source, have your compass compensated to correct for excessive deviation. 