The Hebrews were not well know for being sailors. Some of them were fishermen, that does not make them sailors.<quoted text>
Heck, just about every sailor knew the earth was round since sailing ships all came into view top of sails first and mountains that were far away were only visible on top.In addition early Christians using scripture all said the earth was a sphere. I wonder why almost all Christians believed that?
Due to the influence of the Greeks the fact that the world is a sphere was fairly well known after Jesus died. Many translations were affected by the proper knowledge of the shape of the Earth. How do you think Genesis might have been translated if they knew the truth about evolution?