The video talks about how early sailors navigated the oceans before the invention of the magnetic compass. The Vikings used ravens to find land, while the Pacific Polynesians used the motion of stars and other natural phenomena. The video explains how to find the North Star, which is a reliable way to navigate at sea. The video also discusses the use of a chronometer to determine longitude, which was a significant development in navigation. Finally, the video mentions that modern ships rely on GPS for navigation.

How Did Early Sailors Navigate the Oceans

how-did-early-sailors-navigate-the-oceans

Let's do English ESL general grammar practice. The video talks about how early sailors navigated the oceans before the invention of the magnetic compass. The Vi…