Hi Peter - you don't really need to bother with any of the scales on the back. Once you've identified the Octans trapezium, just rotate the scope to match the reticle to the stars - job done. The whole time/date thing is not critical for Southern Hemisphere users as there are multiple points to determine rotation from. If all you had was Polaris - you'd need to have the reticle oriented accurately.
Cheers
Andrew.
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