Topography for Field Artillery

Topography for Field Artillery

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...of yards or in kilometers, from the position to the 1160--1130=30 feet=10 yards', or the difference in elevation between crest and 0. P. 1130--1100=30 feet=10 yards, or the difference in elevation between the crest and the gun. 10-4=2.5tfi=the site to the O. P. 10-l=10tfi=the site to the crest. 10--2.5=7.5-/i. 7.5X1=7.5 yards= amount of defilade at the position. B. PROFILES. 320. Defilade also may be determined by means of profiles, as follows: From the enemy observation post draw a profile or series of profiles of the terrain including the proposed position or roadway. The method of construction is the same whether visibility or defilade is sought.' Draw a straight line, representing the line of sight from the observation post, tangent to the covering crest, see fig. 100. At the position measure the vertical distance from the surface of the ground to the line of sight, drawn as above. This distance, according to the vertical scale of the profile, is the amount of defilade of the position. C. TABLE OF DEFILADE. 321. Although usually determined by a personal inspection of the terrain, the following kinds of defilade may be determined from the map: Materiel Defilade, where the materiel is just below the plane of defilade. Dismounted Defilade, where the level of the ground is 1.8 meters below the plane of defilade. Mounted Defilade, where the level of the ground is 2.5 meters below the plane of defilade. Dust Defilade, where the piece is far enough below the plane of defilade that the dust, caused by firing, will not be visible from the enemy position. This last varies with the weather and the terrain and is difficult to obtain except in swamps, along watercourses, and by wetting down the position. A convenient table showing amounts of defilade...show more

Product details

  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236587669
  • 9781236587664