What do the Global and Local settings for position decode mean on the IFR6000?

What do the Global and Local settings for position decode mean on the IFR6000?

The Global setting uses both odd and even position squitters to determine the aircraft’s location. While effective, it may take longer to decode or fail entirely if the aircraft is near the edge of a GPS segment. This method relies on receiving consecutive squitters for accurate position determination. The Local setting uses a known latitude and longitude provided by the operator, combined with either an odd or even position squitter, to decode the aircraft’s position more efficiently. This is similar to "GPS assist," as the inputted location helps speed up and improve decoding accuracy. Providing a precise, surveyed latitude and longitude ensures the system’s integrity and accuracy are properly tested. For a valid test, the aircraft’s antenna must be directly over the known location, allowing verification of critical parameters like SIL (Source Integrity Level) and NACp (Navigational Accuracy Category for Position).