Page 100 - Loss of the VOC Retourschip Batavia, Western Australia, 1629

Part of a brachiDlus or so-called Armken van Barentsz D A T 3083
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Thiswaspartofanastro/abumcatholicumoruniversalastrolabe(seeFig_42).Two olher examples are known, one from Nova Zembla, which has lhe brachio/us and wooden slide (Crone, 1916 and 1966) and lhe olher from the V.O.C.j1uijt I.1Jstdrager (l653) which consists only of the brass brachio/us (St6nuit, 1974).' The Batavia brachio/us is about 1.5 times larger lhan the Lostdrager fmd. The astro/abum catholicum was used for solving problems of spherical geometry - a simple and cheap modificaLion for seamen, of lhe more complex universal astrolabes.
Figure42. PhotographofthebrachiolusorArmkenvanBtUenlsz. 90