We haven’t seen a lot in the way of Sat Navs here at CES yet, but rest assured they’re lurking out there in their thousands. Yesterday, Sony did spill the beans on a couple of new models heading to North America early this year. The NV-U73T and NV-U83T measure in at 4.3” and 4.8” respectively; however each is now just 0.75 inches thick, which is a pretty sensible acknowledgement of the fact that if you actually want to keep your sat nav in your possession for longer than twenty minutes, you’re going to have to carry it with you when you park your car.