Movement in azimuth is obtained by turning =azimuth worm=. The amount of rotation is read from the scale on the azimuth circle and the azimuth micrometer. =The azimuth micrometer= may be turned independently of the azimuth worm to set any desired deflection. Figures in black are for right-hand deflection and in red for left-hand deflection. The scale on the azimuth circle is graduated in 100-mil divisions from 0 to 32 in each half circle. The micrometer is graduated for every mil. For larger angular deflections, by turning the throw-out lever the azimuth worm is disengaged, permitting the head to be turned to any desired position. =The reticule= is provided with a horizontal and a vertical cross line. The horizontal line is graduated in mils. =An open sight= attached to the side of the rotating head is for approximate setting of the instrument. No disassembling or adjustment of the panoramic sight, except as described herein, is to be made, except by ordnance personnel detailed for such work. The panoramic sight is seated in a T slot in a socket of the sight, model of 1916, in firing, and is carried in a panoramic sight case on the shield when traveling. Use of the Panoramic Sight for Direct Fire. Level rocker with zero on range scale opposite 300 on angle-of-site scale and gun at center of traverse. Set azimuth scale at zero, azimuth micrometer knob at zero, micrometer index at zero, elevation scale at 3, and elevation micrometer knob at zero. By means of cross-leveling knob on sight socket bring cross-level bubble level. Correct for deflection in azimuth by turning azimuth micrometer until required deflection is opposite fixed arrow pointer; bring zero on micrometer index to zero on azimuth micrometer by means of micrometer-index knob. Elevate gun by means of angle-of-site handwheel and traverse until cross hairs of panoramic sight are on target. For Indirect Fire. Level rocker and set scales for zero setting as directed in first paragraph under “direct fire.” Lay off required deflection in azimuth by means of micrometer index and azimuth worm knob, so that deflection may be read from azimuth index and azimuth micrometer. Traverse gun until vertical cross hair of panoramic sight is on aiming point. Vertical angles may be read by means of elevation scale and micrometer scale. Zero point of elevation scale is 3. Each division on elevation scale represents 100 mils. All scales are graduated in mils. The open sight on side of rotating head is used to obtain preliminary direction of sight. In turning azimuth angles greater than 100 mils the throw-out lever may be pressed and rotating head turned to nearest division in even hundreds desired. Each unit on azimuth scale represents 100 mils. Panoramic Sight, Model of 1915.