How Ancient Polynesian Sailors Navigated the Ocean
Maps can tell us a great deal about the world we live in. We make maps of the stars, our own brains, and everything in between. Maps are how we find our way in the world, and how we relate to the other places and things around us.
We can also tell a great deal about other people and cultures by studying the maps they made. For instance, check out these maps by Polynesian seafarers of the Marshall Islands. They're called stick charts or rebbelib. Rebbelib are made of bamboo sticks and cowrie shells, with the shells denoting the locations of islands in the chain. The Marshallese used rebbelib like these to keep themselves on course during their travels between the islands, which are separated by miles of open ocean.
The rebbelib were used for centuries, but they're not particularly good as a visual map. They're not to scale, and someone unfamiliar with this type of map would have trouble using one to navigate. And that's because the important information contained in the map isn't the location of the islands. The bamboo sticks that make up the frame also represent ocean currents and wind patterns, which Marshallese sailors use as navigation guides.
The Marshallese have long practiced a unique form of ocean navigation, called wave-piloting, that involves steering between islands based upon the shape and direction of the waves. It's a difficult, dying art, with only a handful of living practitioners. Studying surviving rebbelib is one of the only ways that modern anthropologists can understand how wave-piloting works.
If you look at a map, it can tell you where you're going. These maps can tell a whole lot more.
Source: SAPIENS
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