What is one limitation of GNSS navigation?

One limitation of GNSS navigation is that signal interference can adversely affect navigation accuracy. GNSS (Global Navigation Satellite System) relies on signals transmitted from satellites to determine location and timing. Various sources of interference can disrupt these signals, including atmospheric disturbances, man-made obstacles such as buildings and bridges, or jamming and spoofing efforts. Such interference can lead to inaccuracies in position fixing, affecting a vessel's navigation and safety.

Understanding this limitation is crucial for navigators, as they must be aware of potential signal disruptions and how to mitigate their effects when relying on GNSS data, especially in complex environments or urban areas where interference is more likely to occur.