To make a job easier, you need the right tools. In fact, if you don’t have the right tools, some jobs might be impossible!
For a long time, lengthy sea expeditions, or voyages, were just not worth the effort. As technology improved, crews could sail farther and farther from shore. Navigation is the science of planning and following a route. Thanks to better tools, navigation became more reliable. These advances let European explorers go to continents they hadn’t even known existed.