What are the limitations of GPS in IFR operations?

The limitations of GPS in IFR operations primarily revolve around its reliance on satellite signals and proper functioning. GPS requires proper programming and setup, ensuring that the system has the correct waypoints and the necessary data to navigate accurately. This aspect is crucial in IFR operations, where pilots depend on precise navigation to maintain safety and situational awareness.

Additionally, GPS signals can be impacted by several factors, including signal loss due to atmospheric conditions, obstructions like tall buildings or terrain, and interference from other electronic systems. These vulnerabilities necessitate a solid understanding of how to use GPS alongside other navigation instruments, as it should not be the sole means of navigation in conditions where reliability is critical.

The other options present misconceptions about GPS. For instance, suggesting that GPS always ensures perfect positioning ignores the real-world factors that can affect signal quality. Claims that GPS is immune to signal loss or interference contradict the established understanding of GPS technology, which is indeed susceptible to various external influences. Indicating that GPS can replace all other navigational instruments without limitations overlooks the importance of having a backup and utilizing multiple navigation methods, especially in IFR conditions where safety is paramount.