User blog comment:IndigoOnIceCream/What if France Said Yes?/@comment-4822327-20120223203438

Looks like in the journey from Spain he made a pit stop in the Azores. If he made the same stop, then he would still be on the same relative course. This is a map of his journeys. Even if he doesn't stop there, he uses them as a reference point. http://en.wikipedia.org/wiki/File:Viajes_de_colon_en.svg