For centuries, mariners relied on equipment aboard the ship for safe navigation. Modern navigational equipment includes a gyro compass, radar, autopilot, global positioning system (GPS), and echo sounder. The faithful equipment forms the base for passage across oceans to deliver cargo or passengers in a safe and timely manner. Over time, the reliable equipment earned the trust of the navigator. The navigator was, owever, trained to never rely solely on any one device to find the way safely.