IMPA CODE：370332
产品名称:航海六分仪 4*40mm
英文名称：Nautical sextants
规格型号：SEXTANT WITHOUT LIGHT 4X40MM_
产地：ZG上海
产品描述：A sextant is an instrument for measuring the angle between two objects by bringing into coincidence to the eye of the observer, rays of light received directly from one object and reflected from the other. Its principal use is to measure the altitudes of celestial bodies above the visible sea horizon. Available in various types. When ordering, specify telescope (magnifying & lens diameter) and whether the sextant should be with or without illumination. Furnished with a wooden or plastic case
