Magnetic Declination Compass Rose Diagram - Historical Navigation Tool #1483043 (License: Personal Use)

This black-and-white technical illustration is a classic magnetic compass rose used in nautical and aeronautical charts to correct for magnetic declination. It displays true north at the top, magnetic north offset by 26°45′ east (as of 1968), and indicates an annual increase of 11 arcminutes-critical for precise navigation before digital GPS. The concentric circles and fine gradations reflect high-precision surveying standards of mid-20th-century cartography.

Typically used in maritime navigation guides, geology or surveying textbooks, museum exhibits on historical cartography, or educational resources explaining magnetic variation. Matches user intent for learning about compass correction, historical navigation tools, or interpreting old maps.