The Highway Code states that your windscreen should be kept clear of all obstructions for obvious reasons. Windscreen pillars already create blind spots without adding a sat nav in an awkward position too. The safest position to place your sat nav is in the bottom right-hand corner of your windscreen. If it is placed anywhere else, this could be illegal. You need to have a clear view of the road and your surroundings, without a sav nav distracting you.