When one keeps in mind how clueless the European shipbuilders were about truly tropical problems, (Columbus lost several ships on each voyage to worm and rot),
and that "the bottom fell out" was a nautical term before it transitioned over to a financial one, one should be skeptical of a lost trading route during pre-history.

It was the 1700s when navies heading into the tropics figured out copper plating the entire bottom hull was almost mandatory for any serious exposure to the tropics...

Now, I would never exclude some prehistoric accidental travel, perhaps by happenstance when blown there during a storm.
But remember only a year or so ago a boatload of four Africans arriving in the Caribbean dead, being unprepared for a journey of that duration.

Frequent revisits I would rule out, had the survivors escaped with their skins, after-legends would have been significant.

Jammer