a small, inclined spar upholding the head of a quadrangular gaff topsail similar in form to a lugsail.
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How to use jackyard in a sentence
She might well have carried her jackyard topsail going west, and certainly wanted it, coming back with sheets off.Yachting Vol. 2 | Various.
jackyard topsails and bowsprit spinnakers preened before it.The Message | Louis Tracy
A jackyard topsail that requires no topmast can be set, and a spinnaker will be found very useful for running in light weather.Yachting Vol. 1 | Various.
One yard ought to serve for both the gaff and jackyard topsail, and these sails should be made the same length on the head.Yachting Vol. 1 | Various.