MIL-B-23306B, MILITARY SPECIFICATION: BINOCULAR, SHIP, 20-POWER, AND ACCESSORIES (15-JUL-1985) [NO S/S DOCUMENT]

MIL-B-23306B, MILITARY SPECIFICATION: BINOCULAR, SHIP, 20-POWER, AND ACCESSORIES (15-JUL-1985) [NO S/S DOCUMENT]., This specification covers a 20-power ship binocular of the prismatic stereoscopic type; a carriage which permits the binocular to be moved in both azimuth and elevation; and a pedestal, on which the carriage may be mounted.