I am trying this as well and I believe I'm hitting the "showPositionError" case for this command. The coordinates are never there, and the success callback never fires later either. This works perfectly well on desktops, laptops, and the paired iPhone. It's almost as if watchOS refuses to pass the location to the browser. I have attempted to set the "Location" to "Allow" (instead of Ask or Deny) in the Safari app settings on the paired iPhone in case that might help, but no change.