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Contributed to navigation methods.
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A marine observatory was established to improve portuguese sailing.
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Sailed around Africa and continued on toward India.
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Used circumnavigation to travel the globe.
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Published the longitudes he found by using astronomy and mathematics.
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The first map of the gulf stream was published.
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Published a book on oceanography.
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The purpose of the expedition was to gain more knowledge of ocean life and its chemical and physical properties.
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Sound Navigation And Ranging
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The invention of a submersible sphere that could be lowered into the ocean on a cable, providing a better look at ocean life.
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Developed ways of making maps and also used longitude and latitude lines.
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Determined the circumfrence of the world.
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Sailed from Greenland to Baffin Island (which he discovered).
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Made a map of the Mediterranean Sea
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Circumnavigated Africa and sailed along the North Atlantic Ocean.