Final answer:
John Cabot used technology such as the astrolabe and magnetic compass for navigation during his voyages, as GPS was not available until the space age.
Step-by-step explanation:
John Cabot, like many mariners of his time, used a combination of tools and techniques for navigation. Since Cabot's exploration took place in the late 15th century, long before the invention of the GPS, he could not have used GPS technology. The correct technological aids available to Cabot were primarily astrolabe and compass for maritime navigation. The astrolabe was an instrument used to observe the positions of the stars, which provided a means to determine a ship's latitude while at sea. For directional guidance, mariners like Cabot also relied on the magnetic compass, which had become a standard navigational tool by the 15th century in Europe.