By approval, I think you mean by the delegates from each state had approved it. The problem was that the states themselves had to approve it. That seemed like a cumbersome process, but you have to remember that democracy works on the will of the people and each state had to ratify it keeping in mind that there were still problems: it was not a slam dunk.
The journey from Africa to the West Indies or North America Usually took about two months. However, the journey would take longer due to vagaries of bad weather that made navigation challenging
