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  #31  
Old 07-28-2019, 09:07 PM
Michael Burbidge Michael Burbidge is offline
 
Join Date: May 2006
Location: Sammamish, WA
Posts: 654
Default GNC 355 vs. GNX 375

The GNC 355 has a com radio while the GNX 375 has ADS-B In/Out.

Besides those differences, are there any differences in the GPS based navigation and approach capabilities of the two units?

Thanks,
Micheal-
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  #32  
Old 07-28-2019, 11:36 PM
Fly2KiteSurf Fly2KiteSurf is offline
 
Join Date: Apr 2011
Location: Grass Roots Airpark 06FD (central Florida)
Posts: 73
Default

Quote:
Originally Posted by g3xpert View Post
Hello Sean,

Receiving and displaying ADS-B traffic and weather from a transponder and controlling that transponder are two very different things.

Thanks,
Steve
Hi Steve,

If a GTX-345R (remote transponder) is used in conjunction with a GNC-355 (GPS/Comm), wouldn't the GNC-355 not only display ADS-B info, but also control the remote transponder?

Thanks,
Sean
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Purchased RV-3 project, restored, flew for 18 months, sold. Purchased flying RV7, flew for 5 years, sold. Currently building RV-14 quick build.
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  #33  
Old 07-29-2019, 06:06 AM
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g3xpert g3xpert is offline
 
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Location: Olathe, KS
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Quote:
Originally Posted by Fly2KiteSurf View Post
Hi Steve,

If a GTX-345R (remote transponder) is used in conjunction with a GNC-355 (GPS/Comm), wouldn't the GNC-355 not only display ADS-B info, but also control the remote transponder?

Thanks,
Sean
Hello Sean,

No, the GNC 355 cannot control a transponder.

Thanks,
Steve
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  #34  
Old 07-29-2019, 06:09 AM
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g3xpert g3xpert is offline
 
Join Date: Sep 2010
Location: Olathe, KS
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Post

Quote:
Originally Posted by Michael Burbidge View Post
The GNC 355 has a com radio while the GNX 375 has ADS-B In/Out.

Besides those differences, are there any differences in the GPS based navigation and approach capabilities of the two units?

Thanks,
Micheal-
Hello Michael,

The WAAS GPS navigator portion of the GPS 175, GNC 355, and GNX 375 is essentially identical in capabilities and operation.

Thanks,
Steve
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  #35  
Old 08-14-2019, 11:06 AM
sumitku sumitku is offline
 
Join Date: May 2013
Location: Victoria, BC
Posts: 43
Default On screen CDI

Steve,

Do you happen to know why the GNC355 does not provide an on-screen CDI while the GPS175 and GNX375 do? The manual states it is only available on 175/375 and not the 355, and the GNC355 iOS simulator likewise doesn't have it.

But, there's a pic on Garmin's blog for airventure 2019 showing an on-screen CDI display showing up on the 355.

Was it reverted, or perhaps it's just upcoming software? quite a useful backup to be missing if say a primary HSI on a PFD fails.

Thanks!

Sumit
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  #36  
Old 09-14-2019, 03:38 PM
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RV6_flyer RV6_flyer is offline
 
Join Date: Jan 2005
Location: NC25
Posts: 3,507
Default GNC 355 Installation Manual

Has anyone been able to get their hands on a GNC 355 Installation Manual?

Would really love to replace my old GX60 with the GNC 355 but will not even start to plan to do it till I know what wiring changes are going to be necessary to install it in place of the GX60 and interface it with the SL30 and CDI plus my G5.

Have done several DuckDuckGo searches and looked around the Garmin website. It appears that Garmin was able to get the radio designed and into production but may still be working on the drawings that will be released to the EXPERIMENTAL world.
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  #37  
Old 09-16-2019, 12:01 AM
mr.sun mr.sun is offline
 
Join Date: Aug 2006
Location: Wet, Western Washington
Posts: 157
Default New Garmin GNC 355 GPS/COM, July 2019

Compatibility with Skyview? Dynon Autopilot? I fly IFR in my RV7 with Skyview and a SL-30. Would like to use more airports without ILS and VOR approaches. How much compatability issues will I run into? Skyview Classic. I already have ADSB in and out so am not needing more than the 355. Nice to have the radio. What do the Garmin Updates cost for this? I use Seattle Avionics for Nav updates for the Skyview currently. I also use their FlyQ Ipad app. Will that connect via Wifi with the 355? I removed the transponder in my avionics stack so have the room for the 355. How deep is this, room behind the panel? Any special power supply restraints?
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  #38  
Old 09-16-2019, 06:24 AM
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g3xpert g3xpert is offline
 
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Location: Olathe, KS
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Quote:
Originally Posted by mr.sun View Post
Compatibility with Skyview? Dynon Autopilot? I fly IFR in my RV7 with Skyview and a SL-30. Would like to use more airports without ILS and VOR approaches. How much compatability issues will I run into? Skyview Classic. I already have ADSB in and out so am not needing more than the 355. Nice to have the radio. What do the Garmin Updates cost for this? I use Seattle Avionics for Nav updates for the Skyview currently. I also use their FlyQ Ipad app. Will that connect via Wifi with the 355? I removed the transponder in my avionics stack so have the room for the 355. How deep is this, room behind the panel? Any special power supply restraints?
Hello Greg,

We have heard that Skyview installations with the GPS 175 work great, and the same should be true for the GNC 355.

As shown on this page, annual navigation database updates for the GNC 355 are $299 for the U.S. Updates are via SD card or via an optional Flightstream 510 WiFi.

The GNC 355 is 11.23 inches deep from the front of the panel to the back of the connector.

At 14Vdc, the COM radio connector uses 1.8A typical, 6.0A maximum and the main unit connector uses 0.6A typical, 0.9A maximum.

Thanks,
Steve
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  #39  
Old 09-16-2019, 08:06 AM
h&jeuropa h&jeuropa is offline
 
Join Date: Jun 2008
Location: Kalamazoo, MI
Posts: 263
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I'm beginning to think a GPS 175 and GTR 200 make a better solution than a GNC 355 for me. I really need a comm and an intercom. The combination is less expensive and provides the intercom. Am I missing something?

Does the GTR 200B give much additional capability? I don't own or use a smartphone, just an iPad.

Jim Butcher
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  #40  
Old 09-16-2019, 10:25 AM
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g3xpert g3xpert is offline
 
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Location: Olathe, KS
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Post

Quote:
Originally Posted by h&jeuropa View Post
I'm beginning to think a GPS 175 and GTR 200 make a better solution than a GNC 355 for me. I really need a comm and an intercom. The combination is less expensive and provides the intercom. Am I missing something?

Does the GTR 200B give much additional capability? I don't own or use a smartphone, just an iPad.

Jim Butcher
Hello Jim,

Agree that if you need an intercom, the GTR 200/200B with a GPS 175 is probably a better choice.

Without the need to interface a phone using Bluetooth, the only other advantage to the GTR 200B would be connection to a Bluetooth music source.

Thanks,
Steve
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