The Australian Motor Sports Club conducted a Navigators’ Trial on November 7 or 8.
As the small article in the Argus says, there were 17 starters and the course was in the NE Hill Country.
The fact that the article lists the winner as F. Walter (Ford V8) seems to suggest that the driver placing were determined by sub-events. It seems the winning navigator was F. Cardwell in a Singer 1500.