These Navigational Geocoin series revitalizes and pays tribute to the use of those antiquated devices which the GPS receiver made obsolete. Some of these coins provide a little history behind the devices used, and others are actual working replicas which can provide you with your approximate location. Each coin has a story to tell; each coin represents several centuries worth of navigational development for mankind. Try them out yourself and see what they were like to use. Develop some of the skills which helped our ancestors discover the lands we now live on.