What 3 Words has been gaining in traction in terms of its use, although there are some people who are yet to be convinced. There is apparently an existing system for those who have a phone signal, which is called Advanced Mobile Location (AML).
What 3 Words' advantage is that the app stores all the locations, and so only GPS is needed to find a location and then report it via text or similar. The app should be installed on the phone in advance of any activity of course.
I joined a support network called 'The Squares' and was pleased to receive a little gift in the post the other day.
The newsletter shows that the use of the addressing system is growing, and it us being built into new cars for example.
The system has been introduced to Mercedes Benz