Whether it is recoverable or not apparently after 30 days it quits pinging — and thus moves into the not recoverable category by default.
I guess the point I would be making is what if the black box didn’t go off until next month (just for a theoretical example) — let’s say it doesn’t even start pinging until April 10th. That would mean that it wouldn’t stop pinging until approximately May 10th.
Then the other theoretical example is that it may never start pinging at all. In that case, there would never be 30 days to “count down”. The black box (in that case) would never be relevant at all.
I hope you see what I mean ... :-) ...