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The Astrolabe Project

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Abstract

Marine astrolabes were a simplification of the existing Islamic calculating devices and were used during the sixteenth and seventeenth centuries to measure the height of the sun at noon on sailing ships. With this value and the proper tables, sea captains could calculate the latitude and estimate the position of their ships during the long oceanic voyages that characterized the first age of globalization. This paper presents an inventory of all marine astrolabes known to exist, and proposes a taxonomy and chronology of their styles, based on the available data.

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Acknowledgments

The authors would like to thank a long list of people whose information was paramount to the conclusion of this paper. It is impossible to list them all here, but here are a few: Francisco Contente Domingues, Jorge Semedo de Matos, Alexandre Monteiro, Gustavo Garcia, Eliot Mowa, Vicente Benítez Cabrera, Roberto García Guerra, Cesar and Elena Acosta, David Bouman, Diecerick Wildeman, Erika Laanela, Lori Temple, Mark Ferguson, Tim Rast, Jason Nowell, James Hyslop, John Brandon, Corey Malcom, Alejandro Mirabal, Sean Kingsley, Bobby Pritchett, Walter Zacharchuck, Paul Brandt, and many others.

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Correspondence to F. Castro.

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Castro, F., Budsberg, N., Jobling, J. et al. The Astrolabe Project. J Mari Arch 10, 205–234 (2015). https://doi.org/10.1007/s11457-015-9149-9

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  • DOI: https://doi.org/10.1007/s11457-015-9149-9

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