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04-18-2019, 06:42 AM
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Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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No, it is not..
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RV-6, bought from builder.
O-320, slider, carb, mags, FP
Last edited by moosepileit : 04-18-2019 at 07:07 AM.
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04-18-2019, 07:03 AM
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Join Date: Jun 2011
Location: Nashua, NH
Posts: 536
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Put transponder in a easy place to access, and remove it when privacy is a concern. No longer equipped if not in plane.
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Mike
RV-4 #2750
N654ML
IO-360
WW150C Prop
1018 lbs
Flying
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04-18-2019, 07:05 AM
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Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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Really- totally counter to the regs?
Google your N#....
__________________
RV-6, bought from builder.
O-320, slider, carb, mags, FP
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04-18-2019, 08:03 AM
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Join Date: May 2006
Location: Pocahontas MS
Posts: 3,884
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Debating a switch/removal option is fun, but the current reg poses a very real and serious operational problem.
With the old Mode C regs, if you have a failed transponder it's perfectly legal to operate the a/c without it as long as you're clear of 'alphabet airspace'. But if I'm reading the ADSB reg correctly, if the installed ADSB-out quits, you're grounded. I'd blame it on the devious Airline Lobby, but "Never assume a conspiracy when incompetence will do."
Regardless, it is absolute insanity, and needs to be addressed.
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04-18-2019, 10:05 AM
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Join Date: Dec 2005
Location: Bellevue, WA
Posts: 165
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Wow. This thread keeps going. Kind of interesting though.
Turning off my xponder is not an option (for me). I'm based at a towered airport; Class C airspace withing the veil of a Class B airport. Further, I'm not willing to give up the amount of airspace I'm currently free to fly in.
To be clear; I welcome the ability for all of us to see each other as blips on an in-cockpit screen, and for ATC to see us as blips on their screens. For me this makes simple sense in the name of situational awareness and safety. And I'm happy to pay a reasonable amount of money to outfit my aircraft as such.
However, it is NOT necessary for my identity to be included in any of this to meet the goals of situational awareness and safety. And this is where I draw the line. I consider it our duty to push back whenever the (this is supposed to be "our") government expands its scope.
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Larry E. James
Bellevue, WA
Husky A1-C
Rocket (under construction)
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04-19-2019, 08:48 AM
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Join Date: Oct 2009
Location: Victoria, BC, Canada
Posts: 3,932
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Quote:
Originally Posted by larryj
Turning off my xponder is not an option (for me). I'm based at a towered airport; Class C airspace withing the veil of a Class B airport. Further, I'm not willing to give up the amount of airspace I'm currently free to fly in.
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Larry, if you're based at a towered airport you're probably going to be given a discrete code on departure anyway, right? So how will you ever be anonymous? Even if you switch to 1200 once you're clear of the zone, the track for code XXXX will line up perfectly with the code for a 1200 aircraft that appeared out of nowhere and departed the area.
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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04-22-2019, 09:43 AM
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Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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Solved for uAvionix Skybeacon TSO
I'm partially happy with the result.
The oddity is I am able to get my transponder replying to ATC just outside my current hangar on the ground. This skewed my test today. I wrote the below, then did a final restart of the UAT WITHOUT the transponder on. It would not enter Anonymous mode until it had the transponder on and replying and showing the 1200 squawk on the uAvionix app monitor page.
Original update begins below, but I realized this all worked due to being in ATC radar contact and giving transponder replies on the ground.
The kludge is remembering to reset your configuration to transmit disabled after a flight, so it is ready for the next flight. Since this requires a power reset on the TSO'd version to re-enable the wifi, you do it post flight. You may leak your ICAO number and N# if you do not have a WAAS position when doing this until transmit is disabled, even leaving anonymous mode on.
Next flight, do not engage transmit enabled until AFTER you have a solid WAAS position on the uAvionix app monitor page. If you then enable transmit on the configure page, not one registered ICAO number or flight ID/N# transmits.
You can fly squawking 1200/Anonymous, get a discreet/non-1200 squawk, I used 1202 in testing- and the Skybeacon automatically reinserts your registered ICAO number and N#/Flight ID. As it must, per specs. When you exit control and squawk 1200 again I see instant return to the previous self-assigned ICAO code and "VFR" flight ID. I do not see how you would be followed save for inability to time travel or position shift.
I also broke the gps fix on the ground, in Anonymous mode with a 1200 Squawk, the self assigned code and N# replaced by VFR both stayed the only transmitted.
Below is the result if you start the UAT in Transmit Disabled configuration, until you have a valid WAAS location, then enable transmit- IF your transponder is replying 1200 to ATC.
The TSO'd version locks out the wifi after 5 minutes, the EAB version does not. IF you want to go from Anonymous to broadcast real info, you'd have to squawk non-1200 or recycle UAT power and then select Anonymous mode off.
If your monitor looks like this you are truly anonymous. Note the 1200 squawk active. This will not happen anonymously on the ground if your transponder is not replying actively.
This is the instant you enable transmit in the configure page of the app.
This is toggling squawk 1200 to 1202 then back to 1200. Anonymous, actual, then again anonymous.

__________________
RV-6, bought from builder.
O-320, slider, carb, mags, FP
Last edited by moosepileit : 04-22-2019 at 01:47 PM.
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04-22-2019, 02:09 PM
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Join Date: Sep 2013
Location: Rancho San Lorenzo
Posts: 885
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Wow. That sure makes the UAvionix units seem to be a lot more fuss to switch between normal and anonymous mode compared to other UAT solutions with a hardwired selector switch option (i.e. GDL-82, Freeflight Rangr, GDL-88 etc).
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RV-8
(a few more airplanes too)
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04-22-2019, 02:37 PM
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Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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Switching is easy. If you are mild on being anonymous on the ground, just leave transmit enabled and Anonymous on. No need to ever touch a switch. In flight, no one sees your N# or your registered ICAO number on either their ADSB-IN or a full up 978mhz sniffer.
If you put in a non 1200 squawk, per the design reqs, you show up as your N# and registered ICAO address number.
Go back to 1200, right back to anonymous.
On the ground, not automatically anonymous unless your 1200 Squawk is transmitted as replies.
__________________
RV-6, bought from builder.
O-320, slider, carb, mags, FP
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04-23-2019, 01:36 PM
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Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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Heard back from uAvionics.
Your transponder MUST be transmitting 1200 code replies, seen by the Beacon product line to enter Anonymous mode.
Not just having selected the ON/transmit position of your transponder control, but actually replying to ATC interrogations. There is a 60 second timeout that explains some of the results.
__________________
RV-6, bought from builder.
O-320, slider, carb, mags, FP
Last edited by moosepileit : 04-23-2019 at 01:39 PM.
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