The English admiral Robert Blake twice attacked the fleet, in the Battle of Cádiz in 1656 and in the Battle of Santa Cruz de Tenerife in 1657, but he managed to capture only a single galleon and Spanish officers managed to prevent most of the silver from falling into English hands. The West Indies fleet was destroyed in the Battle of Vigo Bay in 1702 during the War of the Spanish Succession, when it was surprised in port unloading its goods, but the Spanish sailors had already unloaded most of its cargo. None of these attacks took place in open seas. In the case of the Manila galleons, only four were ever captured by British warships in nearly three centuries: the Santa Anna by Thomas Cavendish in 1589, the Encarnación by Woodes Rogers in 1709, the Covadonga by George Anson in 1743, and the Santísima Trinidad in 1762. Two other British attempts were foiled by the Rosario in 1704 and the Begonia in 1710. These losses and others due to hurricanes were significant economic blows to trade. Famous shipwrecks Wrecks of Spanish treasure ships, whether sunk in naval combat or, as was more usually the case, by storms (with the ones which occurred 1622, 1715, 1733 and 1750 being among the worst), are a prime target for modern treasure hunters. Many, such as the Nuestra Señora de Atocha, and the Santa Margarita have been salvaged. In August 1750, at least three Spanish merchantmen ran aground in North Carolina during a hurricane. The El Salvador sank near Cape Lookout, the Nuestra Señora De Soledad went ashore near present-day Core Banks and the Nuestra Señora De Guadalupe went ashore near present-day Ocracoke. Encarnación The wreck of the Spanish merchant ship Encarnación, part of the Tierra Firme fleet, was discovered in 2011 with much of its cargo still aboard and part of its hull intact. The Encarnación sank in 1681 during a storm near the mouth of the Chagres River on the Caribbean side of Panama. The Encarnación sank in less than 40 feet of water. The remains of the Urca de Lima from the 1715 fleet and the San Pedro from the 1733 fleet, after being found by treasure hunters, are now protected as Florida Underwater Archaeological Preserves. Capitana The Capitana (El Rubi) was the flagship of the 1733 fleet; it ran aground during a hurricane near Upper Matecumbe Key, then sank.