Militaire

1975 · 83984 — Washington DC: United States Army c1975. Presumed First Edition First issuance thus. Clears plastic/vinyl sheet with printing on one side only. Fair. Overall dimensions: 40 inches long by 23½ inches wide. RARE surviving copy of this map overlay. This has been folded and refolded. There has been some transfer of printing to otherwise clear portions of the plastic sheet. Information is presented in red purple orange yellow blue and black colors. Scale is 1:250000 kilometers and 1 to 50000 kilometers. Show yields of 2kt 5kt 30kt 100kt 300kt and 1MT. On the right side is a yield scale for 150kt to 1 MT. To its left is another scale in KM from 4 to 1000 with a designation of DWD at the top. Further to its left is a smaller scale in KM from 8 to 160 with the designation of EWS at the top. The ABC-M5A2 radiological fallout predictor is a transparent device used to outline the zones of hazard resulting from surface bursts for preselected yield groups. The ABC-M5A2 fallout predictor is composed of two simplified predictors and a nomogram for determining the downwind distance of Zone I. One simplified predictor is drawn to a scale of 1: 50000; the other predictor is drawn to a scale of 1: 250000. This predictor contains six preselected yield groups A B C D E and F. All you need to know to use this is: Wind speed and direction location of ground zero and actual or estimated with your ABC-M4A1 yield of the nuclear weapon. This overlay is used for surface or low air burst weapons. Nuclear fallout is the residual radioactive material propelled into the upper atmosphere following a nuclear blast so called because it "falls out" of the sky after the explosion and the shock wave has passed. It commonly refers to the radioactive dust and ash created when a nuclear weapon explodes. The amount and spread of fallout is a product of the size of the weapon and the altitude at which it is detonated. Fallout may get entrained with the products of a pyrocumulus cloud and fall as black rain rain darkened by soot and other particulates which fell within 30-40 minutes of the atomic bombings of Hiroshima and Nagasaki. This radioactive dust usually consisting of fission products mixed with bystanding atoms that are neutron-activated by exposure is a form of radioactive contamination. Fallout comes in two varieties. The first is a small amount of carcinogenic material with a long half-life. The second depending on the height of detonation is a large quantity of radioactive dust and sand with a short half-life. All nuclear explosions produce fission products un-fissioned nuclear material and weapon residues vaporized by the heat of the fireball. These materials are limited to the original mass of the device but include radioisotopes with long lives. When the nuclear fireball does not reach the ground this is the only fallout produced. Its amount can be estimated from the fission-fusion design and yield of the weapon. United States Army unknown