Traditional Austronesian generalized sail types. C, D, E, and F are types of crab-claw sails.[1] Double sprit (Sri Lanka)Common sprit (Philippines)Oceanic sprit (Tahiti)Oceanic sprit (Marquesas)Oceanic sprit (Philippines)Crane sprit (Marshall Islands)Rectangular boom lug (Maluku Islands)Square boom lug (Gulf of Thailand)Trapezial boom lug (Vietnam)