Hi Peter,
I have had the same problem so I looked up the AGRF Computation Geoscience Australia which will work out the degrees diffrence of your location..I gave your location Morayfield -27hrs 06mins 152.56 degrees
The diffrence value is 10.925 degrees..so if you're holding a compass and facing magnetic North you need to turn 10.925 degrees to the WEST for true North...hope this helps
Cheers!
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