Early explorers

The video discusses the evolution of navigation techniques from the 15th to the 18th century. Initially, explorers used dead reckoning, a method based on previous positions, speed, and direction, to calculate longitude. This method was inaccurate, leading to the development of chronometers in the 18th century, which allowed explorers to determine longitude by comparing local time with the time at a known location, such as the Greenwich Observatory. Today, GPS technology provides precise navigation, but the spirit of adventure in sea exploration remains.

What method did sailors use in the 15th century to calculate their position?

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How did sailors measure the speed of their ship?

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What was the significance of chronometers in navigation?

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Explain how explorers calculated their longitude using the position of the sun.

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What modern technology do sailors use today for navigation?

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