Is the astrolabe reliable?

Everything is constantly changing, nothing is absolutely reliable, and so is the astrolabe. The astrolabe system has existed for so long that it naturally has its reasons. This is where he is reliable, but if you really want to say that he is reliable, it is not entirely true. Many times I just use it as a tool, use it when I need to use it when I meet a problem, and throw it aside after the problem is solved. Therefore, it is reliable when it is used and unreliable when it is not used. It has reliable parts and unreliable parts.