> having markings you can just wipe away and needing to re-measure and re-mark the item regularly sounds far from optimal. Unless the delibility of ink was a f

> having markings you can just wipe away and needing to re-measure and re-mark the item regularly sounds far from optimal. Unless the delibility of ink was a feature they desired. Hypothesizing that they were trying to prevent a working ranger from falling into the wrong hands wouldn't strike me as absurd. Dropping them in a firepit or stream to remove the ink would be pretty handy if you know your military encampment is about to be over-run and you can't save everything.