Poor man's GPS

I'm thinking this is a combination of the "scale" - related mapping jokes and a standard GPS joke. Those wavy lines in the comic would indicate the globe is presenting some sort of non-visual information to the driver. But given the location on the globe that he's probably looking at where is he driving? It looks like he's staring at the middle of the Indian Ocean. The artist is Paul Tarnowski.

There's plenty of other examples of attaching a globe to a car as a navigation device:
Some do it in order to pre-empt marital disputes
Even the Romans did it