Yeah, those ULB's are remarkably efficient (sarcasm) in both their range and battery endurance assisting in locating lost aircraft, assuming they survive and are exposed toward receivers.
Autonomous ELT's with self contained GPS chips, in aircraft structure could be designed to ping satellites with a simple request from a satellite to an aircraft which could be initiated by an Airline Ops center, Air Traffic Control facility or other government agency.
I know, it would cost $$$$$$$, and have to go thru regulatory circus antics, but thankfully so few $$$$ have been wasted, sorry, spent so far with just this one missing T7.
