The star globe ZG-OM1.1 is a model of the celestial sphere and is intended for solving astronomical problems associated with determining the location of a ship in the sea. Technical characteristics: Accuracy of taking coordinates of the luminaries: ± 1 Graduation: 1 ° Globe diameter, mm: 168 Weight, kg, no more: 2.6 Overall dimensions of the globe with a case, mm: 240x265x215 Operating conditions: Ambient temperature: from 0 to 45 ° С Relative air humidity at 35 ° С: 98% Validity of the globe map: until 2025