I like this idea, surely if a window was allowed to take into account mechanicals etc and was maybe text based I think it would work.
usually when you text back you will be home or lower level and have network coverage.
Then using the tracking above if you didn't reply in the given time a call to be made to a nominated number to cover any flat batteries etc and if no response or confirmation of "home safe" a alert to the relevant services would be made.
As was said if it saves one life it must be worth exploring the options,
SUFR
as and when you need some test dummies I'd gladly help you out :mrgreen: