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.
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
[jak-stohn] /ˈdʒækˌstoʊn/ noun 1. 1 (def 5a, b). 2. jackstones, (used with a singular verb) 1 (def 5c).
noun, Nautical. 1. a gunter having a wire rope with a traveler in place of the usual upper iron.
noun, Nautical. 1. a two-masted sailing vessel square-rigged on the foremast with a fore-and-aft mainsail; brigantine.
noun, Nautical. 1. a barkentine square-rigged on the mainmast above a gaff mainsail. 2. Also called four-masted brig. a sailing ship having four or more masts, the foremast and mainmast being wholly square-rigged, the others being fore-and-aft-rigged. 3. any sailing ship of three or more masts carrying an otherwise nameless rig.