Thanks for the replies guys. Now im more confused than ever :)
From the flight safety article they state "An Airborne Report is required on first contact with Centre, Approach or Departures after departing a Class C or D aerodrome with a surveillance service (for example, radar or ADS-B). So to me that reads that some class D aerodromes do have radar? If that is the case, how can you tell which ones do and which dont?
The fight safety article also says " non-controlled aerodromes allows for two scenarios—one where there is no surveillance available and one where surveillance exists and aircraft identification is expected with the Departure Report." Again, to me that is saying there are some non-controlled aerodromes (class g?) DO have surveillance (radar?) . If this is true, again how can you tell?
Based on the radar coverage map that kiwi303 linked too, there is no radar at alice springs even at alititude. So even though you might be in class C airspace, there is no radar at alice springs. So am i right to assume that not all class C airspace has a radar service?
BTW, here is the flight safety article im refering too:
http://www.flightsafetyaustralia.com/2015/11/demystifying-departure-reports/