Astronomy...
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they used astrolabes, which is a tool that help you use the sun and stars find your location, and they used magnetic compasses.
Although Hypatia could make hydrometers & astrolabes, she was not the one who invented them.
People make use of constellations by helping their way traveling
She was able to make astrolabes for people.
Astrolabes, maps
a sailor uses an astrolabe by using it to tell latitude
Astrolabes can still be found in use today to measure the amount of day light remaining or for general navigation. The Astrolabes was replace by the easier to use Davis quadrant at the end of the 17th century.
most likely a ship and compass
Astronomy...
Before the invention of maps, people relied on landmarks, natural features like mountains and rivers, the positions of the sun and stars, and knowledge passed down through generations to navigate. They would use techniques like triangulation and dead reckoning to estimate their position and find their way.
She could make astrolabes.
R. T Gunther has written: 'The astrolabes of the world' -- subject(s): Ashmolean Museum, Astrolabes, Bibliography
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It was made by scientist, Arab Concelia.
Yes, Vasco Da Game did use a compass. He also used other tools such as astrolabes, charts, cross-staffs, and nocturnals.