Jib

In sailing ships, triangular sail rigged to a stay extending from the foremast, or foretopmast, to the bowsprit or to a spar, the jibboom, that is an extension of the bowsprit. The jib is first known to have been used on one-masted vessels. Its use began to spread about 1600 and extended to larger war vessels about 1700. Jibs proved handy in helping to steer and were much valued—e.g., on