(25+ pages) This is an introduction to using the sky to estimate your location (latitude & longitude). The PDF format will allow you to guide your students step-by-step in how to use the daytime or nighttime sky to help estimate your location at sea. Practice problems, note pages, maps, and answer sheets are included. Topics include: Polaris, Little Dipper, Big Dipper, Latitude, Longitude, Greenwich Mean Time, Rotation, Prime Meridian, Equator, & Altitude. Follow up this introduction with our Celestial Navigation 1, 2, & 3 activities and your students will be old world navigators!