Sat nav:
1 the maps are only as good as the data – make no assumption that your map is accurate. Check you map data and accuracy and get the upgrade package
2 Postcodes in the UK are variable esp in rural areas – a post code will get you within 0.5m – you may still have to use that rarest of skills, common sense
3 Remember: shortest routes out of / into departures / arrival cities / towns , quickest routes BETWEEN so change the settings en route
4 A geek wrote the program that designates your route . and he may not have worked for Apple, indeed may not even be able to drive
5 Get the UK ’safety’ camera and speed trap package – its worth its weight
6 Sat nav only works for intelligent drivers
7 Find the internal settings and tweak them – PNDs are surprisingly accurate for ETA etc
8 Try inputting the route and then ignore it until you know you need it – the road is mnor important than the screen
9 The male brain [left side] has greater capacity to navigate than the machine – but it can always tell you where you are at that moment which is when you tell IT where to go!!!