Anyone with a need to give their exact location, whether that is to friends, family or the emergency services, ought to consider a free to download and use app, What3words.
The app, for iOS or Android as well as desktops, divides the world into a series of 3m x 3m boxes, each identified with a unique combination of three words.
So, giving a location quickly and easily no longer needs exact co-ordinates or map reading skills, just the three words that the app generates.
The app can be downloaded from here. More detail is available by navigating through the website.