Austronesian sail types
Austronesian sail types are typically fore-and-aft with spars along one or more edges and include a triangular variant with spars on the upper and lower edges, informally called a crab claw sail. They were first developed by the Austronesian peoples by at least 2000 BCE. == History == The crab claw sail was invented by the Austronesians somewhere in Island Southeast Asia by at least 2000 BCE. It spread with the Austronesian migration to Micronesia, Island Melanesia, Madagascar, and Polynesia.