What was early navigational tools of European explorers?

Early navigational tools used by European explorers included the magnetic compass, which helped determine direction based on Earth's magnetic field. The astrolabe was used to measure the altitude of celestial bodies like the sun or stars to determine latitude. Additionally, the quadrant and cross-staff were used to measure the angle between a celestial body and the horizon for navigation purposes. These tools were crucial for explorers to accurately navigate the seas and discover new lands during the Age of Exploration.