For a protractor, I use a copy of this: http://www.maptools.com/pdf/UTMTools/24kPocket.pdf which is a free download on the www.maptools.com website. I poked a small hole in the very center of it and added a string, add suggested on the Ranger Rick website: http://www.therangerdigest.com/Tips%20Tricks/24%20map%20protactors/24%20map%20protractors.htm