EASA NAV(A)basic
A line connecting points of zero magnetic variation on an aeronautical chart is called an ______ line.
Answer
agonic
Explanation
An isogonal, or isogonic, line connects locations having equal magnetic variation. The agonic line is the special isogonal line where variation is zero. **Key takeaway:** Isogonals map equal variation.\n\n**Glossary:** **Agonic line**: line of zero magnetic variation.
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