How are NDBs represented on aeronautical charts?

NDBs, or Non-Directional Beacons, are represented on aeronautical charts using magenta circles or squares. This color coding is part of the standard symbol system used in aviation, which helps pilots easily identify navigation aids on charts. The use of magenta is specific to enroute navigation. The NDBs are essential for navigation as they provide aural signals to aircraft, allowing pilots to determine their position relative to the beacon.

Other representations on charts use different colors and shapes for various navigation aids, which assist in differentiating between them. For example, VORs are typically represented as blue squares, while other important navigational features may have their distinct symbols. The consistent use of colors helps pilots quickly understand the type and purpose of navigation aids depicted on the charts.