Here's why:
* Determining Latitude: The primary use of the astrolabe was to measure the angle of the sun or stars above the horizon. This angle, combined with the time of day, allowed sailors to calculate their latitude, or how far north or south they were from the equator. This was crucial for staying on course, especially on long voyages.
* Finding Direction: While not as precise as modern compasses, the astrolabe could also be used to estimate direction. By measuring the altitude of stars, sailors could determine their approximate position relative to the horizon.
* Timekeeping: By observing the sun's position and the angle of stars, sailors could estimate the time of day, even when the sun was obscured by clouds. This was essential for planning their daily activities and for navigating by the stars.
The astrolabe was a vital tool for sailors for centuries, enabling them to explore the world and navigate vast oceans.
