The Mariner's Astrolabe: A Survey of Known, Surviving Sea AstrolabesDescriptions of the 65 astrolabes recorded, as of the time of witing in 1988, in the register maintained by the National Maritime Museum, Greenwich. Of these, nos. 1-21 had been described in D.W. Waters, The sea- or mariner's astrolabe (Coimbra: Junta de Investigações do Ultramer,1966); nos. 22-65 were added in the intervening period. "This study is closely modelled on Waters' earlier paper although the historical documentary evidence has not been repeated in full. The diligent student is advised to refer back to the 1966 paper. I have, however, reused parts of the 'notes on individual instruments', where they still apply, of the original twnty-one astrolabes and the Type numbers devised by Waters to classify the instruments. To this classification I have added two more types ..."--Page 11. |
Contents
Foreword by Lt Cdr D W Waters RN rtd | 9 |
Copies mistaken identities and fakes | 45 |
Acknowledgements | 51 |
Copyright | |
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Common terms and phrases
alidade altitude Arts et Métiers astro astrolabe dated astrolabe NMM astrolabe was recovered Atocha axis pin badly eroded ballast On centre Banda base ballast Batavia Bay astrolabe bottom ballast Casa de Contratación centre face Concepción Destombes method Dundee Dutch astrolabe Dutch East India DYAS English face of bottom five circle Girona GOYS GUEDES GUNTHER Ia Obliterated Iberian illustration instru instrument maker Kronborg labe LIMB Obliterated Lisbon LOCATION Museo London Lyme Bay Madrid mariner's astrolabe MARKS Obliterated Mewstone Museo Naval Museu de Marinha National Maritime Museum NATIONALITY Dutch NATIONALITY Portuguese nautical navigation Nederlands Scheepvaart Museum NOTES This astrolabe Oxford Padre Island Palermo Palmas parallel sided pinnules Portugal Portuguese astrolabes Sacramento Santa Escolastica SCALES OF LIMB semi-circle similar sixteenth century Skokloster Skokloster Castle stamped star suspension ring Tenri THICKNESS Treasure Salvors TYPE la DATE upper quadrants Vergulde Draeck WATERS wedge sectioned astrolabe WEIGHT Western Australian Museum wreck zenith distance