Pretty sure it's Portugal.
The navigation school was important because it provided training and education in maritime navigation skills, which were essential for sailors to safely navigate the seas and reach their destinations. This training helped improve navigation accuracy, reducing the risks of getting lost or encountering hazards while at sea. It also contributed to advancements in maritime exploration and trade by producing skilled navigators who could accurately chart courses across the oceans.
Prince Henry started his navigation school in Sagres, Portugal.
Because of him, Portugal became the first country to explore. If he didn't start the "school of navigation" there would be no exploration. So he is the most important.
The School of Navigation was founded in the 15th century, during the Age of Exploration.
Prince Henry School of Navigation at Sagres, Portugal - 1419
It was founded in Lisbon, Portugal by Henry "The Navigator."
The compass and the astrolabe made navigation by sea, and therefore exploration, possible.
People in the 1400's didn't have high school. It didn't exist until 400 years later, so he didn't go to high school. He began as a ship's boy and went the school of Navigation by Prince Henry of Portugal.
School of Navigation: About 1418, Prince Henry started the first school for oceanic navigation along with an astronomical observatory at Sagres, Portugal. In this school, people were trained in nagivation, map-making, and science, in order to sail down the west of Africa.
Jesus
Dr.P.Narayana