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Sailing routes

A number of potential sailing routes may be followed around the tip of South America. The Strait of Magellan, between the mainland and Tierra del Fuego, is a major—although narrow—passage, which was in use for trade well before the Horn was discovered. The Beagle Channel (named for the ship of Charles Darwin's expedition), between Tierra del Fuego and Isla Navarino, offers a potential, though difficult route. Other passages may be taken around the Wollaston and Hermite Islands to the north of Cape Horn.

All of these, however, are notorious for treacherous williwaw winds, which can strike a vessel with little or no warning; given the narrowness of these routes, vessels have a significant risk of being driven onto the rocks. The open waters of the Drake Passage, south of Cape Horn, provide by far the widest route, at about 800 kilometres (500 miles) wide; this passage offers ample sea room for maneuvering as winds change, and is the route used by most ships and sailboats, despite the possibility of extreme wave conditions.