Originally Posted by
Da40Pilot
I think this is as close I will get to what may be a correct answer. I remember the RAIM or GPS needs to be accurate to 0.3NM at the FAWP, and that the interrogation is continuous. I also pulled up AC 90-100A which states, as CLT Guy mentioned above that RNAV requires a total system error of not mor than 1NM for 95% of the flight time.
Not sure why they're asking this question either, but, rather be safe than sorry, every question missed is worth 4% for that 80% passing score.
The RAIM question does not ask about distance. They are asking about how many time does it interrogate the receiver to know that it has a usable signal strength. I believe the answers to choose from were 3, 4, 5, or 6.