-Vertical angles up to 0.80 mils and elevation angles falling within ± 0.40 mils may be read off the reticle with a
maximum accuracy of 0.05 mils.
8.7.To determine the polar coordinates, proceed as follows: - Use the compass to orient the Angular Mount as directed
under 7.5.3;
- Aim the rangefinder to the object; - Read the azimuth of the object;
- Range the object as directed under 9.3.
8.8.To convert the polar coordinates into rectangular coordinates, proceed as follows:
- Take out the coordinate converter from the case;
- Release the clamp and detach the rule from the reverse side of the plotting board;
- Determine the polar coordinates of the reference point and the target as directed under 9.7 and note them down on the plotting board or a special card;
- Calculate from the determined magnetic azimuth Am of the reference point and the target to find the directional angles, reckoning in the compass correction ∆ A obtained from the formula:
α= Am – ∆ Am
-Read the compass correction ∆ Am of the map;
-Note down the reference point target directional angles on the plotting board of card;
-8. OPERATING PROCEDURE
8.1.The rangefinder is designated to: - Survey the ground;
- Range fixed targets;
- Range moving targets;
- Take azimuth and magnetic azimuth measurements; - Take elevation and vertical angle measurements;
- Find polar coordinates of targets and reference objects; - Convert the polar coordinates of the target and reference
object into rectangular coordinates, and find the target and observation post coordinates from the predetermined reference coordinates.
8.2.To use the rangefinder for ground surveillance, aim it with hands roughly on the desired object, and then adjust it fine by rotating the azimuth and elevation knobs.
8.3.For ground surveillance do the following:
- Set the
- Aim the rangefinder on the target so that it is observed in the central gap of the reticle as close as possible to its centre, and the screening objects (bushes, trees, terrain elevations, etc.), which are located near the target or partially mask it, are outside the gap. Locate the target in the lower portion of the gap, touching the bottom mark of the reticle;
- Press the MEASURE 1 button, wait until the readiness indicator comes on and release the button.
- Read the measured range. It will be displayed on the range indicator for 3 to 5 seconds.