Bight (geography)

In geography, a bight is a bend or curve in a coastline, river, or other geographical feature. It typically indicates a large, open bay, often only slightly receding. It is distinguished from a sound by being shallower. Traditionally, explorers defined a bight as a bay that could be sailed out of on a single tack in a square-rigged sailing vessel, regardless of the direction of the wind (typically meaning the apex of the bight is less than 25 degrees from the edges).

...
Wikipedia