Altitude Quadrant, 19th century

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Brass quadrant used to measure the altitude of a star (or celestial object) above the horizon. The Mariners’ Museum 2017.0005.000001A

Brass quadrant used to measure the altitude of a star (or celestial object) above the horizon. The Mariners' Museum 2017.0005.000001A

Brass quadrant used to measure the altitude of a star (or celestial object) above the horizon. The Mariners’ Museum 2017.0005.000001A