1 gallon of water is the equivalent of 8 pounds. The required amount of potable water for a 90 day voyage such as the Trans-Atlantic slave story has it, would take anywhere from 81 to 162 tons of potable water. I did not even calculate the weight or space of barrels to hold the water. Where would you keep it? It was a 90 day voyage on average; give or take a few days. The water weight alone would sink the ship. There was no way to contain the human wastes in the ship, and a cholera outbreak would have wiped out the entire cargo and crew.
Human excrement gives off gases of methane, chlorine and ammonia; which are irritants to the lungs, and methane can cause asphyxiation in enclosed spaces; as well as being highly combustible.
The amount of food needed for a voyage that long would have been immense. The average human body consumes about 4 pounds of food a day. 81 tons of food would have been required for this voyage. So, between food and water, it would have been a requirement of 162-243 tons. We have not even factored in the human body weight. If you take an average body weight of 150 pounds for cargo and crew, you have another 33.75 tons. Now we are up to 195.75-276.75 tons.
Do not forget to factor in "rogue waves" and hurricanes. These factors alone undermine this story from making any sense. Under critical scrutiny, you can tell that lies have been written to enforce the theft of land, especially when European explorers tell you through phenotypical descriptions of who they found when they came over here.
LIES MAY GET OFF TO A FAST START, BUT THEY WILL NEVER OUTPACE THE TRUTH.