To what reference is a VOR compass rose aligned?

A VOR compass rose is aligned to Magnetic North. This is crucial for navigation, as pilots rely on magnetic headings when using VOR (VHF Omni-directional Range) equipment. Magnetic North is the direction that a magnetic compass points, and its position can differ from True North due to the Earth's magnetic field, which varies across different geographical locations.

Using Magnetic North ensures that the readings pilots get from their VOR systems are consistent with the headings indicated on their magnetic compasses. This alignment helps pilots accurately navigate and determine their aircraft's position relative to the VOR station. Understanding this concept is essential for effective ground-based navigation using VORs.