Answer: It allowed him to navigate the seas using the sun and stars.
Step-by-step explanation:
The astrolabe was used as a common instrument among Majorcan sailors and was part of Vasco da Gama's second trip to India in 1502-1503. The astrolabe device allows you to determine the position of the stars, so that navigators, astronomers and scientists, used the device to locate the stars and observe their movements. This could determine latitude and local time.