Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 24

Thread: Question about IFR requirements

  1. #11

    Join Date
    Oct 2014
    Location
    Tehachapi, CA
    Posts
    219
    Quote Originally Posted by FlyingRon View Post
    That still leaves him without a legal navigation source. The GNX375 is not approved for IFR use in certificated aircraft.
    It most certainly is. See:

    https://buy.garmin.com/en-US/US/p/577174

    Last paragraph on the page says:

    "With installation approval available for hundreds of Part 23 Class I/II aircraft models, adding a GNX 375 navigator to your cockpit is a straightforward, all-bases-covered proposition."

  2. #12
    FlyingRon's Avatar
    Join Date
    Aug 2011
    Location
    NC26 (Catawba, NC)
    Posts
    2,627
    It can be "installed" in certified planes. It's still not approved as the sole means of IFR nav.

  3. #13

    Join Date
    Oct 2014
    Location
    Tehachapi, CA
    Posts
    219
    Quote Originally Posted by FlyingRon View Post
    It can be "installed" in certified planes. It's still not approved as the sole means of IFR nav.
    How so?

    14CFR Part 91.205(d)(2) USED to say:

    (2) Two-way radio communications system and navigational equipment appropriate to the ground facilities to be used.

    but the current version says:

    (2) Two-way radio communication and navigation equipment suitable for the route to be flown.

    So the requirement for ADF/VOR or any other GROUND based navigational equipment doesn't exist - an approved enroute and approach GPS (which the 175 / 355 /375 family is) is adequate to be legal. Obviously, only GPS approaches can be flown, but there is no longer any requirement for other IFR navigational equipment. This version of 91.205 apparently went into effect on 8/30/2017.

    Did you have some other regulation in mind?
    Last edited by Marc Zeitlin; 05-25-2020 at 09:52 AM.

  4. #14
    FlyingRon's Avatar
    Join Date
    Aug 2011
    Location
    NC26 (Catawba, NC)
    Posts
    2,627
    Because unlike VORs and ADFs, certificated planes need appropriate TSO approval for IFR use even for enroute and terminal (let alone approaches). The GNX does not have this. The FAA relented on the units like the GNX being used for the ADS-B requirement but not anything else. This is not a sole-means IFR navigator.

  5. #15

    Join Date
    Jul 2011
    Location
    Clarklake, MI
    Posts
    2,461
    Flight manual supplement says GNX 375 is approved for stand alone IFR navigation, specifically:

    "Single engine piston aircraft under 6,000 lbs. maximum takeoff weight:
    Required Equipment for IFR operations utilizing GPS navigation: Single GPS
    175/GNC 355/GNX 375 Navigator"

    All other aircraft require:
    "second source of TSO-C146 approved GPS navigation or a separate source of VHF navigation"

    That's good enough for me.

  6. #16
    geosnooker2000's Avatar
    Join Date
    Apr 2019
    Location
    West Tennessee
    Posts
    52
    Sooo... Add a GNX375, and then anything else I want to really use that does not require telescopic glasses to see from 3 feet away (like a Garmin G3X)? I really don't understand how people can actually use something with that small of a display as far as map display.
    Last edited by geosnooker2000; 05-26-2020 at 01:11 PM.

  7. #17
    FlyingRon's Avatar
    Join Date
    Aug 2011
    Location
    NC26 (Catawba, NC)
    Posts
    2,627
    It's not intended to be used as such, it just gets a small display so it can fit into a "transponder-sized" piece of real estate. They expect you'll use it to drive something else.

  8. #18
    geosnooker2000's Avatar
    Join Date
    Apr 2019
    Location
    West Tennessee
    Posts
    52
    Thank you for the explanation. It's not always easy getting info on stuff that seasoned pilots already know and take for granted that us newbes don't know! Cheers!

  9. #19

    Join Date
    Jul 2011
    Location
    Clarklake, MI
    Posts
    2,461
    Quote Originally Posted by geosnooker2000 View Post
    Sooo... Add a GNX375, and then anything else I want to really use that does not require telescopic glasses to see from 3 feet away (like a Garmin G3X)? I really don't understand how people can actually use something with that small of a display as far as map display.
    I fly a plane with an 375 and since I'm one of the few pilots that does not use an ipad when flying lightplanes, I use the screen. Seems to work okay for me and that's with tri-focal correction. I can't imagine a younger fella having to struggle due to screen size.

  10. #20
    geosnooker2000's Avatar
    Join Date
    Apr 2019
    Location
    West Tennessee
    Posts
    52
    Well... I'm 52, so...

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •