may be set above it, though this latter element of a square-rigged sailplan fell into disuse early in the 18th century CE. In this form, in addition to carrying the spritsail itself the spritsail yard, mounted under the bowsprit abaft the dolphin striker, also often provided some lateral support for the jibboom and flying jibboom via the guys supporting those spars. See also Crab claw sail Oselvar References External links Web article about triangular 'Leg-o-Mutton' sprit sail rig. Video of sailing the Oselvar A spritsail-rigged Norwegian traditional wooden boat. Sailing rigs and rigging