True, Grid & Magnetic: Declination That Drifts by Year
This lesson is part of the course
In this lesson
You update a fictional declination to the year of the hike, convert map bearings to compass bearings and back with the grid–magnetic angle, and keep every result between 0 and 360°.
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Lessons in this course
- Map Scales: Map Centimetres, Ground Kilometres & Areas Locked
- Grid References: 6- and 8-Figure References ↔ Metres Locked
- Bearings from Coordinates: ATAN2, DEGREES & MOD Locked
- True, Grid & Magnetic: Declination That Drifts by Year Locked
- Contours: Height Differences, Slope % and Slope Angle Locked
- Dead Reckoning on Foot: Pace Counting, Legs & Position Locked
- Aiming Off & Error Cones: What a Few Degrees Do over Distance Locked
- Capstone: Navigation Log & Position Plot Locked