Apply deviation and variation corrections to convert between true, magnetic, and compass headings
Input Parameters
Results
--
True Heading
degrees
--
Magnetic Heading
degrees
--
Compass Heading
degrees
--
Total Correction
degrees
Reference
True = Magnetic + Variation
Magnetic = Compass + Deviation
CAN DEAD MEN VOTE TWICE: Compass→Dev→Magnetic→Var→True (add going up)
TVMDC: True→Var→Magnetic→Dev→Compass (subtract going down)