Astrolabe, compass, rudder and movable sails, map.
He used a compass and a sextant on his expedition. :)
He used his compass to navigate where he was going.
Columbus asked John II of Portugal to pay for an expedition across the Atlantic.
spain
Gunpowder and new forms of steal.
Bartholomew Dias used navigational tools such as compasses, astrolabes, and cross-staffs to navigate during his expedition. He also likely used charts and maps to help guide his way along the coast of Africa.
Spain
1492
They.........
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4
No, but Spain did.