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2. Crab claw sail - Wikipedia

   en.wikipedia.org/wiki/Crab_claw_sail

   There are several distinct types of crab claw rigs, but unlike western rigs, they do not have fixed conventional names. [6] 1846 illustration of a Fijian camakau, a single-outrigger canoe with a canted mast "crane sprit"-type crab claw sail. The need to propel larger and more heavily laden boats led to the increase in vertical sail.

3. Austronesian vessels - Wikipedia

   en.wikipedia.org/wiki/Austronesian_vessels

   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.

4. Rig (sailing) - Wikipedia

   en.wikipedia.org/wiki/Rig_(sailing)

   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 extremely fast. On a beam reach, it may be the fastest simple rig. Crab claw examples

5. Mast-aft rig - Wikipedia

   en.wikipedia.org/wiki/Mast-aft_rig

   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]

6. Jukung - Wikipedia

   en.wikipedia.org/wiki/Jukung

   It is a traditional fishing boat, but newer uses include "Jukung Dives", using the boat as a vehicle for small groups of SCUBA divers. The double outrigger jukung is but one of many types of Austronesian outrigger canoes that use the crab claw sail traditional throughout Polynesia.

7. Fore-and-aft rig - Wikipedia

   en.wikipedia.org/wiki/Fore-and-aft_rig

   The fore-and-aft rig is believed to have been developed independently by the Austronesian peoples some time after 1500 BC with the invention of the crab claw sail.It is suggested that it evolved from a more primitive V-shaped "square" sail with two spars that come together at the hull.