GTN650, G5’s, GNC255 upgrade

[Randomskylane]

I have the 355 so maybe it’s different but…. It’s connected to the 275 ahrs version and gi106

fwiw

 

[pnancoz]

Hi, I realize your comment on this thread is old, but do you have the gnc255 connected to the G5 AND the separate CDI (GI 106)? I’m upgrading to two gi275s and replacing an ancient com #2 and nav #2 with a gnc255. I’m trying to decide whether to keep my GI 106 and would love to have my NAV2 connected to both the gi275 AND the GI106. The installer is telling me the 255 has to connect to the GI 275 OR the GI 106 but can’t link to both…

The gnc255 is only connected to the GI 106. The GTN 650 is connected to the G5.

 

[Ed Haywood]

“3 independent GPS sources.”
Unless you have equipment for GNSS, Galileo, GLONASS, or BeiDou, (pick 3) you have 3 GPS receivers, not sources. Right now I have 3 - an iPad, a handheld hikers gps and my phone. But all three are receiving from the GNSS constellation.

[fixed spelling]

To nitpick, if you have GNSS equipment then you have an average of 8 to 10 sources of position data, of which a minimum of 4 are necessary to compute an accurate location.

 

[Eric Pauley]

I decided to go with the route of completely independent #2 NAVCOM. GTN650Xi + GNC255/GI106 (that I already had). GTN connects to 275s. Last thing I need in life is to be cursing out the Garmin intern in IMC when the 275s both fail at once.