Infantry Drills

B-89: Data Section

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B-89. The gunner completes the position identification, date, weapon, and circle value according to TC 3-21.75. The table information is as follows:

  • Number. Start with left and right limits, then list TRPs and reference points in numerical order.
  • Direction and Deflection. The direction is in degrees and taken from a lensatic compass. The most accurate technique is to have the gunner aim at the terrain feature, and to have the driver dismount and align himself with the gun barrel and the terrain feature to measure the azimuth. To achieve correct deflection and elevation readings of the terrain feature, select TOW. Show the deflection reading taken from the BFV’s azimuth indicator in the deflection block next to the magnetic azimuth.
  • Elevation. Show the gun elevation reading in tens or hundreds of mils. The smallest increment of measure on the elevation scale is tens of mils. Any number other than “0” is preceded by a “plus” or “minus” symbol to show whether the gun needs to be elevated or depressed. Ammunition and range must be indexed to have an accurate elevation reading.
  • Range. This is the distance, in meters, from vehicle position to L and R limits and TRPs and reference points.
  • Ammunition. List types of ammunition used.
  • Description. List the name of the object.
  • Remarks. Enter the weapons reference point data. As a minimum, weapons reference point data include a description of what the weapons reference point is, a six-digit or eight-digit grid coordinate of the weapons reference point, the magnetic azimuth and the distance from the weapons reference point to the vehicle position.
Figure B-9. Example of a completed range card

Next: B-90: Sector Sketches

Go Back To: U.S. Army FM 3-21.8: The Infantry Rifle Platoon and Squad