Compass and Anchor Tattoo. Could be best friend or couple tattoo. The anchor would be to hold the other no matter what happens, no matter what big storms come their way. & the compass is of course, to be the one to guide each other.
An anchor and wheel couple tattoo. As these two go together they are a perfect fit for couple tattoos. There are also words etched on the e wrists saying quotes that also reflect what the symbols are for.