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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]
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 extremely fast. On a beam reach, it may be the fastest simple rig. Another evolution of the basic crab claw sail is the conversion of the upper spar into a fixed mast.
Lateen rig features a three-sided sail set on a long yard, mounted at an angle on the mast and running in a fore-and-aft direction. Crab claw sail (also known as Oceanic sprit or Oceanic lateen) features a three-sided sail with spars on both the foot and the head. It's either mastless, supported by a "prop", or mounted on removable or fixed masts.
The outrigger canoe was one of the key technological innovations of the Austronesian peoples.Although there is little archeological evidence due to perishable building materials, comparative reconstructions indicate that Austronesians already had the distinctive outrigger and crab claw sail technology from at least 2000 BCE.
Bigiw with tanja, crab claw, and spritsails from the Island Garden City of Samal, Davao del Norte. Bigiw is a small double-outrigger sailboat native to the islands of Mindanao (particularly in the Island Garden City of Samal), Visayas, and Palawan in the Philippines. It is used for personal transport or small-scale fishing and can hold one to ...
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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.