Magnetic Variation

glossary.index.last_updated_prefix April 20, 2026 · glossary.index.editorial_byline

glossary.index.h2_what_is

glossary.magnetic-variation.definition

glossary.index.formula_label

TC = MC + VAR (East is least, West is best)

glossary.index.h2_how_used

glossary.magnetic-variation.how_its_used