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- Master (Oceans or Near Coastal (Uninspected Fishing Industry Vessel)) »
- Q183 - Navigation General: Oceans
196. How does the standard magnetic compass heading differ from the true heading?
The standard magnetic compass heading differs from the true heading by compass error, which is the combined effect of variation and deviation. Compass error represents the total angular difference between true heading and compass heading, and is calculated as the sum of variation and deviation.
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