I know the road safety rules 2009 prohibits any P plate driver from using a mobile phone in the car for any purpose, including as a GPS hands free.
But what if you were to use an iPod touch connected to your phone via a personal hotspot?
Effectively the iPod would function as a GPS unit (which is legal), but it would have google maps and therefore be infinitely better than every Garmin gps in existance.
The iPod isn't a mobile phone, but in the police's defense (or offense?) they could say it is a communications device and you could be using it while tethered to a LTE Wifi dongle and be using Whatsapp / Messenger to call your friends….
Just saying. You should just ask the police.