If you connect to a Garmin GLO, you probably are up in the 99.99%s
FWIW, in my TB20, an Ipad2 would lose GPS routinely, and a GNS2000 GPS never picked up EGNOS…
But yes the basic point is that to fly a plane accurately enough you can do it with some pretty cheap kit. You won’t get autopilot coupling though so – like my yoke mounted Aera 660 – this is for dire emergency use only.
Who wants to bet that a samsung tablet I bought in 2012 and the extra waas/sbas antena will perform better than many of those certfied non-waas G430?
I flew with both and I know which one to use for navigation accuracy and for screen size…if one plans to fly with 1200ft cloud base enroute & approach the problems are heating, battery and wifi rather than integrity & monitoring of gnss constellation/signal at 100ft agl in tick fog
I guess it is a matter of time to see consumer IPads with in-built wass (as it has been done for baro pressure & gyros)
I’ve never known my yoke mounted Nexus 7 ever to lose GPS signal.
RAIM needs a baro input from the aircraft’s pressure altitude encoder.
Peter wrote:
RAIM needs a baro input from the aircraft’s pressure altitude encoder.
But surely once you have SBAS you don’t need to worry about RAIM?
Peter wrote:
RAIM needs a baro input from the aircraft’s pressure altitude encoder.
I have never heard that and I don’t see any technical reason why. Do you have a source?
Neil wrote:
But surely once you have SBAS you don’t need to worry about RAIM?
If you have SBAS GPS and you’re receiving an augmentation satellite, then RAIM is not relevant.
But surely once you have SBAS you don’t need to worry about RAIM?
Indeed, but I was questioning the whole claim by pointing out that there is no (practical) way to baro-aid a tablet product.
Do you have a source?
It is standard in RAIM-capable IFR GPSs to have pressure altitude input.
Whether this is the only way to achieve RAIM I don’t know.
I also don’t see any practical way to produce a certified (SIL=3) ADS-B OUT device which is portable. However we did this in other, ADS-B, threads 
