How did Prince Henry become known as Henry the Navigator?

Answer: Prince Henry of Portugal (1394-1460) was called the Navigator not because he went to sea himself, but rather because he encouraged exploration in the early 15th century. He did the organization that was needed for long voyages to succeed. He began sending out expeditions in 1418

Explanation: Because he encouraged exploration in the early 15th century

He led the way in Portugal's eastward exploration ... Portugal continued to explore eastward and developed a new trading empire.