I agree with these points, and yet:

"Humberside Police also used the system to find a group of foreign nationals, including a pregnant woman in labour, who were trapped inside a shipping container at a port.

The port had over 20,000 containers and we knew that we needed to get to them quickly," said the force's control room supervisor Paul Redshaw.

The group were told to download the app and they were soon found.

There is no doubt in my mind that these incidents could have had very different outcomes had we not been able to use what3words," Mr Redshaw said."

The emergency services see something very useful here. Is there a better way to do it? Lat/Lon numbers just don't cut it.