Answers to Compass Error Practice Lesson

Coastal Navigation Course
Chapter VII

Answers to Compass Error Practice Lesson
Remember: Going from True to Compass If You Add, Compass Error is West
If You Subtract Compass Error is East
(West is Best, East is Least)

True
Course

Compass
Error

Compass
Course

1. 164° 12° E 152°
If T- CE = C – Compass Error is East – 164 – 12 E = 190
2. 189° 1° W 190°
If T + CE = C – Compass Error is West – 189 + 1 W = 190
3. 167° 5° E 162°
If T- CE = C – Compass Error is East – 167 – 5 E = 162
4. 104° 6° E 098°
If T- CE = C – Compass Error is East – 104 – 6 E = 098
5. 276° 11° E 265°
If T- CE = C – Compass Error is East – 276 – 11 E = 265
6. 345° 0 345°
If T = C – Compass Error = 0 no adding or subtracting
7. 147° 9° E 138°
If T- CE = C – Compass Error is East – 147 – 9 E = 138
8. 186° 10° W 196°
If T + CE = C – Compass Error is West – 186 + 10 W = 196
9. 359° 4° E 355°
If T- CE = C – Compass Error is East – 359 – 4 E = 355
10. 234° 8° W 242°
If T + CE = C – Compass Error is West – 234 + 8 W = 242

Chris

Early days of fishing and wakeboarding boats. These days a little more relaxing and sailing time, mostly on catamarans. Still too poor be a yacht man.

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