This document provides instructions for using the basic functions of a Garmin eTrex GPS device. It explains how to navigate between pages like the skyview, map, and pointer pages. It also describes how to view navigation data like latitude, longitude, and trip information. Additionally, it outlines how to mark and name waypoints to save locations, and stresses the importance of recording waypoint coordinates. Finally, it reminds users not to swing the GPS by its lanyard to avoid damage, and to be back in class on time.