ATP-3-09-02 Field Artillery Survey Download
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Angle Determination 16 February 2016 ATP 3-09.02 5-3 Figure 5-2. NE-102 Location and controls (rear view) Vertical Angle Display – Displays vertical angle in degrees, GONS (Northern European graduation equivalent to 1/400 th of a circle) or mils. Horizontal Angle Display – Displays horizontal Angle in degrees, GONS or mils. Battery Capacity Level – When all three black bars are displayed battery is at full operational power. As battery discharges bars will go to two, then one. When “low” appears you have 30 minutes of battery power left. When “Help” is displayed, access is disabled, operations stop, the display locks, and approximately 5 minutes later the power automatically shuts off. Telescope Reticle Light and liquid crystal display (LCD) Backlight Key – Pressing this key illuminates the reticle crosshairs and the LCD. Illumination switches off automatically approximately 1 minute after being enabled, or can be manually turned off by pressing key again. Vertical Angle Priority Display Switch-over Key – Switches vertical angle display to grade reading by percentage, and then to the display of horizontal angle only. Horizontal Angle Reading Direction Display Switch-over Key – Switches the reading direction of horizontal angle, clockwise reading “HA” and counterclockwise reading “HL”. This key will not be used for artillery survey purposes. Horizontal Scale Hold/Horizontal Angle Summary Key – The Hold Key holds current horizontal angle reading, even when sighting direction is changed. Enables the summing of repeated horizontal angle measurements and during Initial Start Up procedures used for saving selections. Horizontal Angle Reset Key–The Rest Key resets horizontal angle to zero. During Initial Start Up procedures used for changing selections. 5-2. See figure 5-3 for an overview of the NE102 display operations (on page 5-4).