Hmmm... not sure of what you mean by 11 degrees east of south...
...east of
magnetic south, east of
grid south or east of
true south?
(EDIT: Just went back to your original post... east of magnetic south...OK!)
I assume you are using a compass to do the initial setup. For Sydney the mnemonic is GMS - grid to magnetic, subtract - and MGA - magnetic to grid, add. True directions are very close to grid for Sydney as well so the mnemonic should still be OK for true to magnetic variation.
I'll take your word for it that your magnetic declination is 11 degrees from magnetic to true (mine is 12 at Oberon so I believe you
).
So,...
True south is 180 degrees true, so set your compass to 180 - 11 =
169 degrees magnetic. So when your compass reads 169 degrees all lined up on the needle, it should be pointing true south.
Hope this helps to clarify the muddy water rather than muss it up some more!!!
Al.