What effect does terrestrial interference have on NDB signals?

Terrestrial interference has a significant impact on Non-Directional Beacon (NDB) signals by disrupting and weakening their reception. NDBs operate primarily in the low-frequency range, which makes them more susceptible to various forms of interference. This interference can stem from natural sources, such as lightning or atmospheric conditions, as well as man-made sources, like buildings, electrical equipment, and other radio transmissions.

When such interference occurs, it can result in diminished clarity and strength of the NDB signals, leading to potential navigation errors for aircraft relying on these beacons. Pilots and navigators need to be aware of these disruptions as they can affect situational awareness and the accuracy of navigation. Unlike more advanced navigation systems, NDBs are particularly vulnerable to this type of interference, making it critical for users to recognize the challenges presented in specific environments.