The correct answer is - The astrolabe could determine the correct latitudinal location of the ship.
The astrolabe was an invention that revolutionized the sea travel. It helped in the sense of determining precise location, identification of starts and planets, and triangulation. This device was used for a long period of time, from the classical antiquity, through the Islamic Golden Age and the Middle Ages, to the period of the Great Discoveries, and it was of crucial importance in the sea expeditions and explorations around the world.