I dont think that would stand up. Surely, as well as giving the coordinates you would also tell them which town you had left and where you were heading. You always repeat coordinates. Coordinates of one type or another have always been used. Which is what makes the new system so unusual.
All you have to do is push the blue button on Google maps and it gives you the coordination to within a metre of where you are anywhere in the world. The 3 word system sounds very complicated.
Another way to give exact coordinates for most of the time, is to open Google maps on your phone and hold your finger on the blue position marker for about 3 seconds.
It will display your exact coordinates at the top of the screen.
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