[Karls48 (Karl)]

Hi
Magnetic declination varies by 1 to 4 degrees between places only tens kilometres apart. For my place 33 45 S and 150 28 E it is12.27 degrees east.. You subtract East declination from your magnetic bearing. In other words your compass is pointing 12 27 degrees East from true North. If you don’t believe me, take your compass and point it on constellation of Octans.. You will read around 170 degrees.
Very good Web site to find Declination is http://www.ngdc.noaa.gov/seg/geomag/jsp/Declination.jsp
Karl