To have followed the speculative vision of Behaim in his famous globe, or of others like him, would have been disastrous, even though their work represents the cream of fifteenth-century mapmaking and was known to Columbus. Indeed, as one commentator has observed, if his chart had been based on the Behaim scenario, 'Columbus could not even have known of the whereabouts of the New World, much less discover it.' Yet not only does he seem to have known where he was going but, on some accounts, when he was going to get there: 'Now and then Pinzon and Columbus consult and deliberate -- mutually discuss their route. The map or chart passes not infrequently from the one captain to the other; the observations and calculations as to their position are daily recorded, their conduct and course for the night duly agreed upon. On the eve of their due arrival Columbus issues the order to stay the course of the armada, to shorten sail, because he knew that he was close to the New World and was afraid of going ashore during the obscurity of the night ... How does he know the place and the hour? 'His Genius' says the Columbus legend in explanation. But the Map? The critics will ask, what did it contain? Whose was it? What did that map contain that was so frequently passed from Columbus to Pinzon during the voyage?' I've presented my case that what the map may have contained was an accurate but ancient, and indeed antediluvian, representation of the coast and islands of Central America, notably the north-south-oriented Great Bahama Bank island, which Columbus -- no less ignorant than any of his contemporaries about the existence of the Americas -- took to be an accurate map of part of the coast of China and the islands of Japan.