Never Lost
Here’s a pretty neat tattoo that the common person wouldn’t understand. At first, this tattoo looked like a circle with a bunch of straight lines, but in reality, you can use this tattoo as a guide to get home. Well, as a guide to get to this person’s home, really.
Many years ago, the OP’s grandfather drew a circle and straight lines, as well as coordinates, that they could use to always locate their home. We have no idea how to read it, but that’s not the point—the point is that it was made by someone dear to the OP as a way to help them if they’re ever in trouble.