What limitations did the astrolabe have that the magnetic compass did not?

The astrolabe was limited by its reliance on clear skies for celestial navigation, making it ineffective during cloudy weather or at night. It also required knowledge of astronomy and the ability to make complex calculations, which could be challenging for many navigators. In contrast, the magnetic compass provided consistent directional guidance regardless of weather conditions or time of day, making it more practical for navigation, especially in unfamiliar waters.