ATP-3-09-30 Observed Fires Download
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Target Location and Identification 28 September 2017 ATP 3-09.30 3-11 Figure 3-6. Observed fire fan (1:50,000) (graphic training aid 6-7-3) Preparation 3-49. The scale of the OF fan must match the scale of the map. To prepare the OF fan- Place the vertex (crosshair) of the fan exactly over the observer's location. Place the center radial in the direction of the center of the observer's area of responsibility. Move the fan slightly until one of the radial lines is parallel to a grid line. The direction of that radial line is the same cardinal direction as the grid line. For example, a radial line parallel to an east west grid line, with the OF fan oriented generally east, would be direction 1600. Note. The observed fire fan does not have to be oriented at a right angle. Any radial line can be parallel with a grid line. With a non-water based map pen, number the radial of known direction. Drop the last two zeros (1600 would be 16). Then label every other radial line with the appropriate direction. Note. Radial lines are 100 mils apart. Use 3-50. To use the observed fire fan- Look at the terrain the target occupies. Determine the direction to the target using the most accurate means available. Estimate the distance to the target by analyzing the terrain.