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They used the astrolabe and compass. The astrolabe was invented by Muslims, and the compass by the Chinese.
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Astrolabes were first widely used in the Middle Ages and by about 1450AD they were in use by navigators. They allowed navigators to calculate the position of the Sun and stars from the horizon. Their use was the first step toward scientific navigation. The great age of exploration was coincidental with their use.
The astrolabe, jackstaff and the compass.
the compass and the astrolabe.
Astrolabe.
From Greek astron "star" and lambanein "to take". It permits astral navigation and mapmaking.
the instruments in navigation are gps's, kamals, sextants, cross staff, back staff, mariners astrolabe, quadrant, and octants :)
the sun
A cross staff is a navigational instrument used to measure angles, typically for celestial navigation, by aligning a crosspiece with an object in the sky. An astrolabe is a historical instrument used to observe and measure the positions of stars and planets. It was used for navigation, timekeeping, and astrology.
The sextant is used in celestial navigation.
Navigators began using the astrolabe for navigation in the early 15th century. It was a key tool for determining latitude by measuring the angle between the horizon and the stars.
An astrolabe helped sailors because it could determine any direction based on the position of the stars. This is why the astrolabe helped sailors.
The astrolabe is a precursor to the modern sextant, which is used for celestial navigation at sea. Both instruments are designed to determine the altitude of celestial bodies above the horizon.
Both the caravel astrolabe and the magnetic compass are important navigation tools for a ship, but the magnetic compass is generally considered more crucial. The compass provides a reliable and constant indication of the ship's direction, allowing for accurate navigation even when visibility is limited. The caravel astrolabe, on the other hand, is used to measure the altitude of celestial objects to determine latitude, and while it is helpful for navigation, it is not as essential as the magnetic compass.
The compass and the astrolabe made navigation by sea, and therefore exploration, possible.