the compass, the astrolabe, the quadrant and the lead.
They use thesatelliteand the computer technology
Clearly, the most important navigational tool available to sailors before was the Stella Maris.
Compass and astrolabe. Along with larger ships and the movable sail it allowed for exploration.
Though he did not explore anything himself, he funded many expiditions and invented new inventions and navigational tools to help ships get to Asia.
Tools developed in the Middle Ages for exploration continued to be used during the Renaissance. One of these was the astrolabe, a portable device used by sailors to help them find their way. By measuring the distance of the sun and stars above the horizon, the astrolabe helped determine latitude, an important tool in navigation. Another tool, the magnetic compass, which had been invented in the twelfth century, was improved upon during the Renaissance. During the Renaissance they used these to travle the seas. They would make these tools normally out of silver, or ivory.
unhelpful
The sun and the stars.
Amerigo used the Astrolabe and the Quadrant
cell phones and computers (:
Navigational tools such as maps and compasses are essential for hikers to find their way through the wilderness.
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He used celestial objects and compass.