Jump to content

Garmin 2 Inch Navigator question in regards to primary IFR navigation source


Recommended Posts

Working with a friend who is trying to go GPS only in her Arrow. After talking with her avionics shop of choice, they claimed that the GPS175/GNC355/GNX375 cannot be used as the primary source of IFR navigation and requires a nav radio like an SL30 or something like a GPS400, GNS 430, or GTN 650. I cannot remember where I heard it but I also remember seeing it in text on one of the forms fairly recently. Has anyone run in to this or heard similar?

Link to comment
Share on other sites

That doesn't appear to be true for any Single Engine piston under 6000 lbs, only for all others - from  the AFMS below.

However, IMO as a CFI-II I wouldn't ever be caught out doing training in actual IMC with only GPS on-board - that's nuts given how easily they're jammed and with almost daily GPS interefence testing NOTAMs putting it at risk of losing coverage. That said, all I ever use to navigate is GPS. But I have lost GPS from jamming 3 times now, including being IMC, (although not yet in US airspace) and each time I was abe to fall back on VOR navigation.  So for me, not even two TSO GPS navigators (which I do have) are sufficient without a Nav radio backup  The Arrow came with 2 nav-com radios, personally I'd want both for an IFR Arrow. 

image.thumb.png.2bde1eb57154468f09c561f50e009108.png

Edited by kortopates
  • Like 1
  • Thanks 1
Link to comment
Share on other sites

The GNC355 can be used as primary NAV in our planes for IFR, as long as you have a second COM at a minimum. Whether you want to have only GPS in your plane or retain ground based NAV is another discussion and Paul brings up some very good points. Here is a post in a different thread which may be the one you were thinking of. I included the information from the GNC355 Installation manual for the GNC355 along with links to an FAA notice from 2013 and the current AIM.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.