Chronometer - a timekeeping device that uses the Earth's rotation to measure longitude, Sextant - Measures latitude better than the astrolabe, Astrolabe - A handheld device used for calculations, including calculating latitude (position relative to the equator), Compass - Uses a magnet which pulls toward Earth's poles., Lateen sail - triangular and could take wind from either side of the ship to make travel faster, Square sails - Traditional sails used in Europe, Gutenberg Printing Press - allowed anything written to be produced without having to handwrite copies,

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