In order to sail from West Africa back to Portugal, the Portuguese had to use a different shape for their . This shape would help them go against the prevailing winds that were trying to push them back towards Africa.

Astrolabe? I’m guessing that because I know that those helped sailors avoid the wind in a certain direction but I could be wrong.

Just think, why was it effective? -it appeled to critics because it was written well, that made it noticeable to the public including the white population-it was also recognizable to the african americans because it was about their heritage.-it was powerful just keep finding more points and elaborate on them. message me if you need more