What makes a job easier? The right tools. In fact, some jobs might be impossible if you don’t have the right tools.
For a long time, it was just not worth it to try to go on extended sea expeditions, or voyages. But then technology began to improve. Soon crews could sail farther and farther from shore. Navigation is the science of planning and following a route. Better tools helped make navigation more reliable. These advances let European explorers go to continents they hadn’t even known were there.