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the compass and the astrolabe.

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What was the effect of improved methods of navigation for portuguese in the 1420?

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During the period from 1368 to 1644, significant inventions included the mechanical clock, which improved timekeeping accuracy, and the printing press, invented by Johannes Gutenberg around 1440, which revolutionized the spread of information. Additionally, advancements in navigation, such as the magnetic compass and improved ship designs, facilitated exploration. The introduction of gunpowder weaponry transformed warfare, while innovations in agriculture, like the seed drill, enhanced farming efficiency.


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What two major inventions helped to advance Portuguese navigation in the second half of the 1400s?

In the second half of the 1400s, the astrolabe and the magnetic compass were two major inventions that significantly advanced Portuguese navigation. The astrolabe allowed navigators to determine their latitude by measuring the altitude of celestial bodies, while the magnetic compass provided a reliable means of determining direction, especially when navigating out of sight of land. These tools enabled Portuguese explorers to venture further into the open seas, facilitating their voyages along the African coast and beyond.