How do you use the Southern Cross constellation to find your latitude? ?

You can't. Unlike the situation in the Northern Hemisphere, where the second magnitude star Polaris marks the location of the north celestial pole, there is no equivalent marker star in the Southern Hemisphere, except for dim Sigma Octantis. The Southern Cross constellation is actually quite far from the location of the south celestial pole, so can't be used to find it.How do you use the Southern Cross constellation to find your latitude? ?you don't. it points, roughly, to the south celestial pole, but the nearest thing to a southern pole star (sigma octantis) requires dark country skies to even see it.How do you use the Southern Cross constellation to find your latitude? ?I believe you measure it's angle above the horizon in degrees.

At the equator, it would be zero, at the south pole ninety degrees.