And all this is approved, as far as approvals are necessary? Sounds very interesting.
Is this mode A, C or S? If C or S, do you get static pressure from the cockpit or does it tie in with existing static plumbing?
Are the units accessible in-flight to change a squawk?
How about the antenna. Is it permanently wired into the aircraft or portable in some way?
Oh, and I assume the Filser uses 200mA instead of 200A...?