[jak-stey] /ˈdʒækˌsteɪ/

noun, Nautical.
a rod or batten, following a yard, gaff, or boom, to which one edge of a sail is bent.
a rail for guiding the movement of the hanks of a sail.
a transverse for stiffening a mast having a gaff sail, coming downward and outward from the head of the mast, passing over a spreader at the level of the gaff, then inclining inward to the mast again near the foot.
noun (nautical)
a metal rod, wire rope, or wooden batten to which an edge of a sail is fastened along a yard
a support for the parrel of a yard


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