Astrolabe Spiral Notebook

Long before there were nerds with telescopes, asttonomy consisted of nerds with these rudimentary sextants, perusing the heavens in search of fame and latitude. And when the global GPS system eventually fails due to neglect and/or whatever, your family, friends, and select neighbours will thank their lucky stars you had the foresight to acquire steadfast technology that will lead them out of the darkness and into the night. Graphics based on a public domain image from Wikimedia. Customisable.