Vegvisir ("the viking compass"). It is said that if this sign is carried, one will never lose one's way in storms or bad weather, even when the way is not known. It is encircled by protection runes. This would be a cool tattoo.
NN Vegvisir - The Icelandic word literally means ‘guidepost’: It is a Norse protection symbol, intended to help the bearer find their way through bad weather. ”if this sign is carried, one will never lose one’s way… even when the way is not known”