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The crab claw sail is a fore-and-aft triangular sail with spars along upper and lower edges. The crab claw sail was first developed by the Austronesian peoples by at least 2000 BCE. It is used in many traditional Austronesian cultures in Island Southeast Asia , Micronesia , Island Melanesia , Polynesia , and Madagascar .
A mast-aft rig is a sailboat sail-plan that uses a single mast set in the aft half of the hull. The mast supports fore-sails that may consist of a single jib, multiple staysails, or a crab claw sail. The mainsail is either small or completely absent. Mast-aft rigs are uncommon, but are found on a few custom, and production sailboats. [1]
Crab claw sails spread from Maritime Southeast Asia to Micronesia, Island Melanesia, Polynesia, and Madagascar via the Austronesian migrations. [3] Austronesians in Southeast Asia also later developed other types of fore-and-aft sails, such as the tanja sail (also known as the canted square sail, canted rectangular sail, or the balance lug sail).
The bottom corner of the crab claw sail is moved to the other end, which becomes the bow as the boat sets off back the way it came. The mast usually hinges, adjusting the rake or angle of the mast. The crab claw configuration used on these vessels is a low-stress rig, which can be built with simple tools and low-tech materials, but it is ...
Austronesians used distinctive sailing technologies, namely the catamaran, the outrigger ship, tanja sail and the crab claw sail.This allowed them to colonize a large part of the Indo-Pacific region during the Austronesian expansion starting at around 3000 to 1500 BC, and ending with the colonization of Easter Island and New Zealand in the 10th to 13th centuries AD.
A tepukei looks like an outrigger canoe with a crab claw sail, and is a very sophisticated ocean-going sailing ship, belonging to the proa type (a main hulls and a massive, buoyant outrigger). Contrary to what Mendana wrote, the outrigger is always kept to windward.
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The Pacific Ocean and particularly Micronesia gave birth to many different forms of simple sailing craft. Sail plan and hull form differ. Sail plans may include lateen, also known as crab-claw or half-crab-claw, Latin, or triangular. Hull formats include catamarans, doubles, proa, and singles.