EASA NAV(A)advanced
31. Given TC 183°, WCA +11°, MH 198°, CH 200°, find variation and deviation.
Answer
VAR 4°W, DEV −2°
Explanation
The supplied true and magnetic headings imply 4°W variation; the magnetic and compass headings imply 2° deviation west under the bank convention. **Key takeaway:** Separate variation (true–magnetic) from deviation (magnetic–compass). **Glossary:** Variation: true/magnetic difference; deviation: magnetic/compass difference.
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