Which navigational outcome was primarily achieved in pre-modern seafaring with altitude measurements using an astrolabe?

💡 Explanation

When observing a celestial body's altitude above horizon using the astrolabe, observers are effectively measuring angular distance used with the solar declination or position of the pole star to directly estimate latitude relative to equator. Therefore knowing latitude results, rather than longitude, tidal predictions, or precise distance which require more complex additional measurements and chronometers.

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