SUNA is broadcast using FM technology and occasionally devices may experience drop-outs. Transmission ‘black spots’ can affect reception, especially in very dense urban areas such as CBD, and terrain effects, (e.g. valleys).
For portable navigation devices the correct placement of the antenna will also minimise the chance of drop-outs. Please refer to the hardware manual for further information.
For current service information please see http://www.sunatraffic.com.au/serviceinfo.html