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At the time that Columbus was making his trip across the Atlantic, very few Portuguese sailors were using celestial navigation and Columbus was not really one of them . Celestial navigation is a technique that measured angles between objects in the sky and the horizon to locate a ship's position on a globe.

Instead, Columbus preferred a technique known as dead reckoning . A ship's navigator determines the position of his ship by tracking the distance and direction traveled from a known, fixed point. This technique depended on a navigator being able to accurately gauge the ship's speed and direction; the direction was tracked using a compass and speed was determined using a complicated system of markers.

There's some controversy surrounding Columbus' league measurement . A league is made up of four miles, but many countries had a different measurement for how long a mile was. Looking at Columbus' records, the typical "Roman" mile of 4,860 feet is not accurate. Most historians believe he used the Geometric League as a measurement for his travels, where a mile would equal 4,060 feet.

Columbus' crew had a bad reputation but it was actually composed of experienced sailors, none of whom were convicts. His most famous ships remain the Pinta, the Nina, and the Santa Maria , the three ships he took on his first voyage . His other ships included the San Juan and the Captiana.

There is also a bit of controversy surrounding Columbus' first landing place because he visited five islands before landing on the actual continent of South America. Columbus' original account of his journey disappeared after he gave it to the Queen of Spain. However, on the island of San Salvador, South America, a whitewashed cross has been erected on the beach at Landfall Parks that is widely accepted as his first landing place.

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12y ago

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