No, you subtract -1 from 180 degrees, which gives you 179 degrees. So you point your compass to north and 179 degrees is where you will find true south. And as Ice said, 93 is your true south sat.iafirebuff said:Thanks! So since my long. is 92.2676w, and i subtract -1 for teh mag dev, 91 would be my true south, correct?