Navigators and outdoor enthusiasts struggle to accurately convert between magnetic and true north in the field

People engaged in navigation, surveying, hiking, and orienteering frequently need to correct for magnetic declination to use maps and compasses accurately, but the process is confusing, error-prone, and varies by location and time. Current solutions require manual calculations, lookup tables, or smartphone apps that may not work offline or in remote areas where navigation is most critical. A single mistake in declination correction can cause significant navigation errors over distance.