Common
Austronesian sail types
Triangular sail with spars along upper and lower edges used by traditional Austronesians
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.
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