What is the primary value of Polaris's position for an observer in the Northern Hemisphere?

Answer

It approximates their latitude

The altitude of Polaris above the northern horizon directly approximates an observer's latitude; a star $x$ degrees above the horizon corresponds to an altitude of $x$ degrees above the celestial pole, which is approximately the observer's latitude.

What is the primary value of Polaris's position for an observer in the Northern Hemisphere?
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