What is a major limitation of satellite-based navigation systems?

One of the significant limitations of satellite-based navigation systems is signal loss and interference. Satellite navigation relies on signals transmitted from satellites, which can be obstructed or weakened by a variety of factors such as buildings, dense trees, or even adverse weather conditions. This makes the system susceptible to inaccuracies or complete loss of navigation capabilities when the signals are disrupted. Such situations can lead to difficulties in maintaining accurate positioning, which is critical for safe navigation in aviation and other fields.

While pilot supervision, accuracy compared to traditional methods, and increased workload are also relevant considerations, the core challenge lies in the reliance on external signals that can be interrupted, which directly affects the reliability and effectiveness of satellite-based navigation systems. This is why a comprehensive understanding of satellite operations includes awareness of conditions that can lead to signal degradation or loss, emphasizing the importance of alternative navigation methods that can be employed during such times.