TM 9-243USING A PLUMB BOB - Continued7Have the assistant measure distance (7) from postto string just above the plumb bob. It should read 2inches. If it doesn’t, move the base or the top of thepost right or left until you get a 2-inch reading onboth rules.When extreme accuracy is desired, measurementwould be taken to the point of the plumb bob (8).Repeat steps 5, 6, and 7 on side 2.11-5
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