pretty interesting HOW DIFFICULT IT IS to find captain's/mariner logs from 1300's/prior -- pre-Copernican...

TIL Columbus & Magellan were contemporaries -- hahaha

maybe Marco Polo, & some others Wikipedia lists...

Eudoxus of Cyzicus (died ~130 BC) - sailed for Ptolemy VIII -- [Hellenistic] Egypt to India -- little else is known/trustworthy -- "dies circumnavigating S. Africa heading northwestward"