1. <span>Tortuga lies on the north side of the great and renowned island of Hispaniola (modern Haiti)
2. The island is small; some sixteen leagues in circumference and acquired its name (Ile de la Tortue, “Turtle Island”) because its shape is that of a turtle.
3. </span><span> At the beginning of the 17th century, the population lived on the southern coast of the island, where there was a port for ships to enter.
The astrolabe is an inclinometer, that is considered to ba analog calculator that is capable of solving the several different types of the astronomy and is mostly used measuring the altitude and the navigational aspects of the celestial bodies day and night and it was used in the Islamic golden age and the middle ages. It is also helpful in determining the land and the sea latitude.
