Survival Tip #135
Always have something to write with and something to write on at all times. I strongly recommend carrying multiple forms, since in the Primal Age text messaging will mean what it did to me in high school, writing a note on a piece of paper and handing it to someone to be read. A heavy duty permenant marker is good for leaving notes on objects like marking off rooms that have been searched, or designating a hazardous area. Smaller utensils like pens and pencils are good for…yeah you should know that one.
I strongly recommended coordinating a symbol with your group so that anyone traveling can mark their message for the rest of your team to recognize. Make the mark something simple, but not something common.