Not sure how? 
Searching and navigating to a what3words address within the app is simple 
Enter your destination in the search bar and hit navigate to get there using compass mode or one of your preferred apps 
Watch how:
#navigation #locationpic.twitter.com/CfkTJgAv2I
-
Why hasn’t TomTom become involved ?
Our tech isn't built into standalone sat nav devices just yet but many Mercedes-Benz and Ford models use what3words within the in-car system. If your car doesn’t support what3words, you can still navigate to a what3words address using apps such as Google Maps, Waze or Navmii.