On Monday, May 15, 2017 at 6:58:11 AM UTC-7, son_of_flubber wrote:
Can TABS (Experimental Glider + TT21 + TN72) be used legally above 10,000 MSL?

I surmise, 'Yes it can', because gliders are (for now) exempt from the 2020 ADS-B Mandate.

'Yes it can' because gliders are (for now) exempt from the 2020 ADS-B Mandate. :-)

I'm also not clear why you are specifically worried about 10,000'.

But can you install TABS at all? In this case yes you can because its an experimental glider. You can't today AFAIK in a *certified* glider (because any ADS-B Out installation has to comply with the 2020 Mandate even if not required).

Any questions on the install I would ask a Trig dealer or go straight to Trig, they are usually very responsive.

And one corner case: There are still airspace areas where gliders are not exempt from ADS-B Out carriage and you cannot use TABS to meet those requirements.