Early humans were more competent seafarers than anyone but Thor Heyerdahl (sp?) seems willing to give them credit for.
For example - during the historic events behind the story “Mutiny on the Bounty” - fearing English revenge the crew of the Bounty sought out an island that was way out in nowhereville with only a vague report that some British sailor thought he saw an island.
When they got there, there were people on it.
Just about every single rock that thrust up from the Ocean capable of supporting human life - has human life on it, most of them for many thousands of years.
What does that tell you about the capabilities of early humanity in regards to navigating the ocean?
Exactly.
Scientific analysis of old chicken bones found in Chile shows Polynesians reached the continent no later than 1407.