Magellan expedition
Crossing the Atlantic

On 10 August 1519, the five ships under Magellan's command left Seville and descended the Guadalquivir River to Sanlúcar de Barrameda, at the mouth of the river. There they remained more than five weeks. Finally they set sail on 20 September 1519 and left Spain.

On 26 September, the fleet stopped at Tenerife in the Canary Islands, where they took in supplies (including vegetable and pitch, which were cheaper to acquire there than in Spain). During the stop, Magellan received a secret message from his father-in-law, Diogo Barbosa, warning him that some of the Castilian captains were planning a mutiny, with Juan de Cartagena (captain of the San Antonio) being the ring-leader of the conspiracy. He also learned that the King of Portugal had sent two fleets of caravels to arrest him.

On 3 October, the fleet departed the Canary Islands, sailing south along the coast of Africa. There was some disagreement over directions, with Cartagena arguing for a more westerly bearing. Magellan made the unorthodox decision to follow the African coast in order to evade the Portuguese caravels which were pursuing him.

Toward the end of October, as the Armada approached the equator, they experienced a series of storms, with such intense squalls that they were sometimes forced to strike their sails. Pigafetta recorded the appearance of St. Elmo's fire during some of these storms, which was regarded as a good omen by the crew:

During these storms the body of St. Anselme appeared to us several times; amongst others, one night that it was very dark on account of the bad weather, the said saint appeared in the form of a fire lighted at the summit of the mainmast, and remained there near two hours and a half, which comforted us greatly, for we were in tears, only expecting the hour of perishing; and when that holy light was going away from us it gave out so great a brilliancy in the eyes of each, that we were near a quarter-of-an-hour like people blinded, and calling out for mercy. For without any doubt nobody hoped to escape from that storm.

After two weeks of storms, the fleet spent some time stalled in calm, equatorial waters before being carried west by the South Equatorial Current to the vicinity of the trade winds.
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