Ballestilla (Jacob's staff). Navigational instrument used to calculate the height of the sun and other celestial bodies over the horizon for use in nautical navigation. 16th century. María Pita House Museum. Corunna, Galicia, Spain.
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Caption:
Ballestilla (Jacob's staff). Navigational instrument used to calculate the height of the sun and other celestial bodies over the horizon for use in nautical navigation. 16th century. María Pita House Museum. Corunna, Galicia, Spain.