—Guess at the data.

—Expose yourself.

—Let your attention be distracted.

—Make unnecessary moves.

—Talk.

Don’ts for Chief of Section:

—Forget that you are responsible for the work of your squad.

—Fail to assist the gunner in laying on the aiming point.

—Say “Muzzle Right (left),” merely move your hand in the direction you desire the trail shifted.

—Write down the data.