Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
 Posted: Sun Jun 11, 2006 3:08 pm Post subject: Experimental IFR w/o a certified GPS (NO!) |
 |
|
Good afternoon Bob,
Note that no where did I specific what sort of nav equipment had to be available to replace using a 129 unit if RAIM wasn't available. Otherwise I agree with your points. I'd love to have a 129 unit, but I think I will wait till I can manage a 146 unit to replace the old KX170B.
BobsV35B(at)aol.com (BobsV35B(at)aol.com) wrote: | Quote: | Good Morning Kelly,
I believe what you say is true, but the language used could be misleading.
There does have to be another source of navigation available.
It doesn't have to be VOR.
If you were in the far north of Canada back when TSO C-129 was first approved, it could have been ADF.
I agree that in any part of the lower forty-eight that I am familiar with, the VOR would be the system used. I am not sure how things are up in Canada these days!
The GPS is supplementary, but it is only the aircraft component of the back up navigation device that has to be operative. The ground stations can be inoperative and the locations of those stations can be used for all GPS functions.
You do not have to fly a route delineated by VOR stations. You can go direct to any point and along any path that the FAA controller is willing to issue a clearance to or for.
If the GPS fails, you must have the capability of switching over to another source of navigation within a reasonable distance. You do not have to be using it all the time.
Obviously, if all the VHF stations are inoperative, the system is not available as a back up. But a VOR or two being inoperative along the route of flight is no problem at all.
Any IFR GPS approved for at least enroute and terminal use can be used in lieu of ADF or DME for any IFR purpose except to shoot an NDB approach.
To execute any approach via the GPS, the approach must be in the database, retrievable by the set being used and the data verified as being current.
The waypoints in the database are the only ones that can be used for navigation. You cannot navigate via GPS using a self loaded waypoint other than in the enroute phase and with the concurrence of the responsible controller. Even that is a little fuzzy, but has been accepted by most regulators as being legal via the controllers authority, not yours.
The old TSO C-129 sets do provide a LOT of capability for the money.
They can eliminate the need for a DME entirely and the ADF for almost all purposes. Any of those approaches that have a note saying "ADF required" or "DME required" or any approach that has DME in the title can be executed without ADF or DME by using the IFR GPS in lieu of those boxes.
Don't sell those 129 units short!
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Air Park LL22
Downers Grove, IL 60516
630 985-8503
In a message dated 6/11/2006 10:46:39 A.M. Central Standard Time, kellym(at)aviating.com (kellym(at)aviating.com) writes:
| Quote: | Not only that, you can't fly IFR with a TSO 129 unit without
conventional nav equipment onboard and working. TSO129 units whether
enroute or approach certified, are NOT approved for sole means or even
primary means of navigation. They are secondary only.
Perhaps you could argue that you don't have to go through the STC/337
process that is required for TC aircraft, but that is about the extent
of it.
|
|
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
