EASA NAV(A)intermediate
A true course is 245° and variation is 7°W. What is the magnetic course?
Answer
252°
Explanation
With west variation, add the variation magnitude when converting true course to magnetic course: $245^\circ+7^\circ=252^\circ$. The opposite sign would incorrectly treat the variation as east. **Key takeaway:** For this convention, west variation is added from true to magnetic.\n\n**Glossary:** **Magnetic course**: route direction referenced to magnetic north.
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