Navigation Graadstok or Jacobs staff made of wood with square cross-section and graduations, Graadstok, a wooden stick with square cross-section. Complementary degree distributions of 0-90 degrees are carved on two opposite sides. In addition to numbers, the graduations are stamped with inscriptions showing which side was used for reading the height (when observing the height of the North Star) and which for the top distance (when observing the sun's height). The slider, which must have been 43.4 cm long, is missing. The stick that originally must have been 85 cm has been demolished, Nova Zembla, Behouden Huys, Willem Barendsz, Jacob van Heemskerck, Claes Andrieszoon Goutum (attributed to), Amsterdam, c. 1590 - c. 1596, wood (plant material), ebony (wood), cutting, l 69.8 cm × w 1.1, × d 1.3 cm
Keywords:
Navigation Graadstok, Jacobs staff, wood, square cross-section, graduations, Graadstok, wooden stick, Complementary degree distributions, 0-90 degrees, carved, two opposite sides, addition, numbers, stamped, inscriptions showing, side, reading, height, observing, North Star, top distance, sun's height, slider, must, 43 4
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