Indirect Laying.

12 trials.

Two aiming points will be selected, one toward the front and one toward the rear. They should be of the type used in actual firing and, for the purpose of this examination, should be about 2 mils in width, well defined, of such height as readily to be brought within the field of view, and about 1500 yards distant. They should be clearly pointed out to the candidates.

All of the guns of the battery will be placed in the order in battery and a candidate will be assigned to each.

For all trials the board will assume a situation in the conduct of fire for adjustment by battery, commencing with the first salvo, that will require commands involving a shift of the trail for this first trial, and, for all trials, such deflection and deflection difference settings and changes of settings of scales, not exceeding the limits prescribed in paragraph 5 of this order, as may reasonably be expected in service.

When the aiming point is in rear the candidate will be allowed an assistant who, from a position in front of the axle, signals to a man at the end of the trail to move it, if necessary, so as to bring the aiming point within the field of view of the sight. When the aiming point is in front, an assistant at the end of the trail is allowed.

The candidates being seated on the gunners’ seats, an officer of the battery commands, for example:

1. Aiming point, the chimney on that white house.

2. Deflection, 440.

3. On No. 2 close 10.

At the last word of command for the deflection each man sets off the deflection; applies the correction for deflection difference appropriate for his piece; causes the trail to be shifted until the sight is directed upon the aiming point; corrects for difference of level of the wheels; raises or lowers the panoramic sight until the field of view will include the aiming point; traverses the piece until the vertical hair is on the aiming point; calls “Ready” and steps clear.

The trial being completed and the men again being seated, the officer commands for example, in continuance of the assumed situation:

1. Right, 120.

2. On No. 4, close 5.

At the last word of command for the deflection, each man operates the sight and, if necessary, the trail as before; traverses the piece until the vertical hair is on the aiming point; calls “Ready” and steps clear.

The third and fourth trial is similarly conducted.

No credits will be given in the following cases:

1. If the sight is incorrectly set for the deflection or deflection difference.

2. If, when the bubble of the cross level is accurately centered, the vertical cross hair is found not to be on the aiming point.

3. If, at any time during the trial, the man has operated the elevating device.

If the piece is found to be correctly laid within the limits prescribed, credits will be given as follows:

Time in seconds, exactly, or less than182021222324
Credits2.01.91.71.51.41.3