I'm planning an updated glider panel with the intention of racing in the future in the US. In a thirty year old club class glider. I've found it very frustrating how little current, concise, useful information is available about what instruments are acceptable, what software is acceptable, etc.

-Are LXNAV products with AHRS available by software key allowed? They are not on this list:

http://www.ssa.org/files/member/Rest...0Approvals.pdf

Butterfly is the only item on that list. Doesn't seem to be a very popular or effective "approval" process.

-The "restricted device policy" suggests a burner phone be carried as opposed to a functional modern phone. Is that the official policy of SSA in 2017?
-The "restricted device policy" claims there will be a list published of acceptable software. And unacceptable software. That might be useful. Where is it?
-This antique discussion thread implies that XCSoar (which as of 2017 still has a not-very-good AH option) is illegal. Is it? Do I have to run some forked version of it?
-In the year 2017 is anyone in the US competing using XCSoar as a flight computer? On a phone with no SIM card installed?

Everything but refrigerators now comes with a built in inertial platform. If you want to guarantee no one flies in cloud, mandate dashcams.

https://www.amazon.com/Btopllc-Recor...words=dash+cam