Mariner’s Astrolabe

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Mariner’s astrolabes measure the altitude (the angle between the horizontal and a heavenly body) of the sun or the pole star, to find latitude at sea. The Mariners’ Museum 1998.0039.000011.

Mariner's astrolabes measure the altitude (the angle between the horizontal and a heavenly body) of the sun or the pole star, to find latitude at sea. The Mariners' Museum 1998.0039.000011.

Mariner’s astrolabes measure the altitude (the angle between the horizontal and a heavenly body) of the sun or the pole star, to find latitude at sea. The Mariners’ Museum 1998.0039.000011.