Why Muslims are under rated.

[Minimalist]

There are constant reports of Roman amphorae being found along the Brazilian coast from shipwrecks. Amphorae were the cargo containers of the day and were ubiquitous at sea. They could be sealed to prevent the contents from being fouled by sea water. Both the Romans and the Carthaginians for centuries before them traveled to the Atlantic coast both to Britain and down the Moroccan coasts for commerce.

It is is simply not impossible that an occasional ship would be disabled by equipment failure or driven by a storm out into the Atlantic. It must be understood that these ships were not designed for open ocean sailing. The hugged the coast and put into shore for the night, to a port if one was available or a bay if not. The crews would forage for food and water. Because of the trade winds a ship could easily end up on the rocks in the Americas. Whether or not anyone would be left alive is problematic. The ships were generally small and had crews of only a few men. Once the water ran out their survival would have been doubtful.

The one thing that is certain is that the trade winds would have prevented them from returning.

This model is fairly representative of the class of vessel we are talking about.