Reference the Cape 4th at Westward Ho!/RND.
Consider for the moment 'cape' in geographical/nautical terms .... it's essentially a point or headland or promontory that juts out into an ocean or body of water.
If you examine in detail the shape of the famous WH!/RND Cape Bunker there is a central section that juts out forming a point or a headland or a promontory, ie forming a cape.
In olden days this point, headland, promontory, ie the cape was also there -
Furthermore, in olden days when flooding occurred, which it did, the area of the now sand bunker would have accumulated water within it thus the point, headland, promontory, the cape would have jutted out into the flood water.
Great feature, great course.
atb
PS - in reality the Cape isn't one bunker these days, it's two bunkers.