Open AccessAn Early Portuguese Mariner's Astrolabe from the Sodré Wreck‐site, Al Hallaniyah, Oman
Author(s) -
Mearns David L.,
Warnett Jason M.,
Williams Mark A.
Publication year - 2019
Publication title -
international journal of nautical archaeology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.357
H-Index - 23
eISSN - 1095-9270
pISSN - 1057-2414
DOI - 10.1111/1095-9270.12353
Subject(s) - astrolabe , portuguese , quadrant (abdomen) , excavation , archaeology , ancient history , identity (music) , art , geography , history , philosophy , physics , pathology , astronomy , medicine , linguistics , aesthetics
A unique leaded‐gunmetal disc decorated with iconic Portuguese markings was recovered in 2014 during archaeological excavations at the Sodré shipwreck site in Al Hallaniyah, Oman. Initially the identity and function of the disc was unknown, although it did possess characteristics suggesting it could be an astrolabe. Laser imaging of the disc post conservation revealed regular scale marks on the limb of its upper right quadrant. Accurate digital measurements of the marks show them to be graded at close to 5‐degree intervals, thus confirming the identity of the disc as a mariner's astrolabe and the earliest known example discovered to date.