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发表于 2011-1-22 17:02
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B. LADDERS are classified as to METHOD by the manner in which the predetermined arbitrary corrections are introduced.
1. INITIAL LADDERS are ladders in which, in addition to known increments or steps, the number of salvos is definitely known. This number is greater than two, and the steps are sufficiently large, so that the target will be located within the limits of the ladder.
2. ADD LADDERS are fired with the initial gun range less than the best range and with successive steps of the ladder fired with increasing ranges, each increasing range spot not less than the pattern size.
3. DROP LADDERS are fired with the initial gun range greater than the best range and with successive steps of the ladder fired with decreasing ranges, each decreasing range spot not less than the pattern size.
4. CONTINUOUS LADDERS are fired with a continuous application of spots, applied in such a manner as to move the salvos back and forth across the target.
a. SPOTTER-CONTROLLED LADDER is a form of continuous ladder in which the spotter or observer determines all or part of initial direction, when to change direction, size of first ladder steps, and when the ladder is reversed. For simplicity, the size of steps of the first ladder and successive ladders is usually prearranged. The initial correction of the first ladder may be directed by doctrine or other orders.
b. ROCKING LADDER is a form of continuous ladder in which the number of Steps of the ladder before reversal of direction and the size of the steps are both specified beforehand. The object is to increase the pattern size and still maintain sufficient projectile density to ensure hits. The steps of the ladder are never larger than the pattern size, and the number of steps is such as will ensure covering probable ranging and aiming errors and target maneuvers during time of flight. If used with continuous fire the steps are applied at regular predetermined time intervals; if with salvo fire, after each salvo.
E14. BARRAGES are a barrier of fire executed on predetermined firing data. The initial shots are placed across the probable path of the target.
A. BARRAGES are classified as to METHOD by the manner in which position of the bursts is varied.
1. LINE-OF-SIGHT BARRAGE is a barrage using fixed fuze setting and varying sight settings, with each shot so directed that bursts will occur in the instantaneous line of sight to the target.
2. FIXED-ZONE BARRAGE is a barrage fired with fixed sight settings. Once the target has passed through the zone of fire, a second zone may be selected and a new barrage fired.
3. CREEPING-ZONE BARRAGE Is a barrage in which the fuze settings are varied in such a way as to advance along the track at a rate slower than that of the actual target advance.
3. 徐进弹幕 |
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发表于 2011-1-26 00:01
不错 不错 学习了
