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Locate a target by shift from a known point

Station C - INDIRECT FIRE - Point C-1

TASK: Locate a target by shift from a known point.

TEST CONDITIONS: During daylight hours, given a lensatic compass, protractor, binoculars, a 3- by 5-inch card indicating the distance and direction to the known point, and a target.

TEST STANDARDS:

1. Determine the observer-target direction within +100 mils of the actual direction (expressed to the nearest 10 mils of the actual direction).

2. Announce the lateral shift from the known point to the target (expressed to the nearest 10 meters). The announced lateral shift must be within 6 degrees x 18 mils x range of the actual lateral shift. (R = the distance to the known point divided by 1,000.)

3. Announce the range change from the known point to the target (expressed to the nearest 100 meters). The announced range change must be to within 20 percent of the actual distance to the target. Example: At a range of 2000 meters, 20 percent would be 400 meters.

4. Complete steps 1 through 3 within 30 seconds.

SOLDIER'S MANUAL CROSSWALK: This task is based on STP 7-11, BCHM14-SM-TG task number 061-283-1004, and on FM 6-30. For this manual only, the Infantry School has modified this task to require the candidate to use a lensatic compass.

EQUIPMENT REQUIRED FOR POINT: Binoculars, lensatic compass, a 3- by 5-inch card indicating the distance and direction to the known point, target, field table, pencil, stopwatch, clipboard, and FB Form 20-11.1-R.

SITE SETUP: Provide an unobstructed view of the target and known point at the site. Indicate the direction and distance to the known point. Place binoculars, compass, and a 3- by 5-inch card on a field table.

INSTRUCTIONS TO CANDIDATES: Say to the candidates--

"Let me have your attention. At this point you must locate a target by shift from a known point.

"You will determine the direction, range, and deviation corrections to shift fire from the known point to the target and announce those corrections to me within 30 seconds."

Point to the known point and the target.

"Do you understand what you must do?"

If anyone has questions, repeat the instructions but do not elaborate on what you have read.

Pause for five seconds and then say--

"BEGIN."

Allow the candidate to proceed for 30 seconds and then say--

"STOP"

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