Quantity:
ID=246MM, OD=260MM (US NAVY PATTERN) CHINA
THE AZIMUTH CIRCLE IS MOUNTED ON THE REPEATER COMPASS. BY MEANS OF A PRISM AND REFLECTION MIRROR, SUNLIGHT IS PROJECTED IN THE FORM OF A LINE ON TO THE COMPASS CARD THROUGH A SLIT, THUS MAKING IT POSSIBLE TO OBSERVE THE SUN. THE MOST COMMON TYPES ARE LISTED BELOW. WHEN ORDERING, PLEASE SPECIFY THE NAME OF THE MANUFACTURER.