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I've never seen a sky that dark and clear! There is another way that only requires a clear view of the southern sky. Taking a line through Alpha Crucis and Gamma Crucis, about half the distance to Achernar from gamma Crucis will put you very close to the SCP. A line through Beta Centauri and Achernar about 1/2 way) will also go very close to the SCP, but not quite as close as the first group.
Another method for finding true south is to use a slender shadow cast by the sun as it transits the meridian(not too crash hot in the summer months), but is is workable, all that is then needed is to set the altitude.
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