3 agents and mounted orderlies, and of any first-class gunner who so elects will include the following: 9. The following general rules will govern the boards: (1) The conditions of examination will be made, as nearly as possible, the same for all of the candidates. (2) Settings of scales will be considered correct if any part of the index is coincident with any part of the line of graduation of the setting ordered. (3) Settings ordered will always be even divisions of the scale, and not fractions thereof. When a number greater than five is used, it will be a multiple of five, except in settings of the angle of site and corrector scales. (4) The candidate may select any of the assistants authorized. (5) The candidate is permitted to traverse the piece to the middle point of traverse before each trial at direct laying. (6) The sight, quadrant, or fuse setter, etc., will be in the position in which it would be in service before the command for any trial with it is given; the scales will be set at readings different from those to be given for the trial. (7) The trials for direct laying will be with different deflections and ranges; for indirect laying with guns, with different deflections and deflection differences; for indirect laying with howitzers, with different deflections, deflection differences, angles of site and ranges; for laying for range, with different angles of site and ranges. With pieces other than the 4.7-inch gun and 6-inch howitzer the trail will be shifted in three trials at direct laying. 4 (8) Changes in setting of scales required of candidates will not exceed the following: Deflection scale of peep sight, 15 mils; of panoramic sight, 200 mils; deflection difference scale, 30 mils; corrector scale, 10 mils; angle of site scale, 10 mils; range scales, 800 yards, except in the case of zone fire, when the changes will not exceed 400 yards in zone 3, two hundred yards in zone 2, one hundred yards in zone 1. At direct laying the deflections announced will be between 6370 and 30. At direct laying the cross level of the tangent sight will be thrown out of level by the examiner as follows: With the 4.7-inch gun and 6-inch howitzer in three trials; with other guns and howitzers for the trials requiring shifting of the trail. (9) In time trials, time will be taken from the word at which the candidate is instructed by this order to commence his trial to the candidate's Ready, or to the last word of any announcement required. No credits will be allowed if the candidate performs any part of the trial after this interval, or if the time taken exceeds the maximum given in the appropriate table of those shown hereinafter. (10) Should any trial be vitiated through the fault of an examiner, of an assistant, or of the sight or other instrument used, that trial will be void and the candidate will be given immediately another trial of the same nature. FOR CANDIDATES FROM 3-INCH GUN BATTERIES. 10. DIRECT LAYING. Twelve trials: Six with the peep sight and six with the panoramic sight. The target will represent a shielded gun and caisson and will be placed, as nearly as practicable, at a distance of 1,000 yards from the gun used in the trials. The candidate being seated on the gunner's seat, an officer of the battery commands, for example: 1. Target, that gun. 2. Deflection, 10. 3. 2400. 5 At the indication of the target, the candidate causes an assistant at the trail to point the piece in its general direction; at the last word of the last command he sets off the deflection and the range ordered; corrects for difference of level of the wheels; operates the elevating and traversing apparatus so as to bring the line of sight upon the target; calls Ready, and steps clear. No credits will be given in the following cases: (1) If the sight is incorrectly set for deflection or range. (2) If, when the bubble of the cross level is accurately centered, the line of sight is found not to be on any portion of the target. If the piece is found to be correctly laid within the limits prescribed, credits will be given as follows: Two aiming points will be selected, one toward the front for two groups of three trials each, and the other toward the rear for two groups of three trials each. They should be of the types 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 at least 1,500 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, except to the right piece, which will be the directing piece. For each group of three 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 the first trial, and, for all trials, such deflection and deflection difference settings and changes of settings of scales, not exceeding the limits pre 6 scribed in paragraph 9 of this order, as may reasonably be expected in service. Before the beginning of each trial an assistant is required to set the quadrant at the range to be used in the trial; he is also required to center the bubble of the quadrant elevation level after each shift of the trail. In trials with the aiming point 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. 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; or, 2. Deflection, 2800. 3. Open (Close) by 10. At the last word of the command for the deflection each candidate 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 wheel; 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 candidates being again seated, the officer commands, for example, in continuance of the assumed situation: 1. Add 120. 2. Open (Close) by 5. At the last word of the command for the deflection, each candidate 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 trial is similarly conducted. The other groups of three trials are conducted in the same manner and at similar commands. No credits will be given in the following cases: (1) If the sight is incorrectly set for deflection or deflection difference. 7 (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 candidate 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 than.... 18 20 21 Credits.. 222 23 24 2.0 1.9 1.7 1.5 1.4 1.3 22 12. LAYING FOR RANGE. Six trials, using the range quadrant. The candidate being seated on the seat on the right side of the trail, an officer of the battery commands, for example: 1. Site, 280. 2. 3400. At the last word of the last command, the candidate sets off the angle of site; sets the quadrant for range; corrects for difference of level of the wheels; turns the elevating crank so as to center the bubble of the elevation level; calls Ready, and steps clear. No credits are given in the following cases: (1) If the quadrant is incorrectly set for angle of site or range. (2) If no part of the bubble of the cross level is between the middle two lines on the glass tube. (3) If there be found to be an error of more than 50 yards in laying for any range less than 1,500 yards or of more than 25 yards for any range equal to or exceeding 1,500 yards. 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 than.... 14 16 18 19 2 20 21 Credits.. 3.0 2.8 2.6 2.4 2.2 2.0 |