Weiß jemand, was das bedeutet und wie man das Symbol richtig verwendet?

Vegvísir
https://en.wikipedia.org/wiki/Vegv%C3%ADsir

excuse me sir but your vegvísir is upside down, it will not work properly when used like this

According to Skuggi’s „Galdraskræða“(spell book): If you wear this sign you will hardly get lost in a snowstorm, or succumb to exposure and will find your way even when unfamiliar.