jackyards

She flew her B signal as yet, but the seconds were drawing on toward the five-minute gun; and beyond, on the ruffled Sound, nine or ten yachts were manoeuvring and trimming their canvas; two forty-raters dodging and playing through the opening stage of their duel for the start; four or five twenties taking matters easy as yet; all with jackyards hoisted.

The White Wolf and Other Fireside Tales Arthur Thomas Quiller-Couch 1903