New World's Opening Keys

Every scientist who measured the Earth's circumference had its own number by calculation. And each figure didn't coincide with other estimates. It should be noted that everyone used a special measure of length, which was applied according to where the scientist lived. Back in the III century BC Eratostfen established that on the meridian of Aswan the degree distance is equal to 700 stages. 700 stages equals 110.25 kilometres.Columbus knew that such researches were carried out, in particular, by the Central Asian geographer of the IX century Al-Fargani.Ptolemy believed that the width of the land is equal to the ocean, his predecessor, the Greek-Syrian geographer of the I century AD Marin Tyrsky proved that the land is much "longer" than the sea. Marin Tyrsky calculated that the land of 360 degrees of the earth's circle is 225 degrees, and the ocean is only 135 degrees.There was, however, a purely practical question: what is the length of the Atlantic sea section?