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Corrected firing data was a term used in the U.S. Coast Artillery to refer to firing data (range and azimuth to the target) that had been corrected〔In Coast Artillery parlance, the term "correction" usually referred to changes in estimated range or deflection (direction) that were made prior to firing. The term "adjustment" usually referred to changes that were made after a shot had been fired and were used to modify the aim of the gun/s for the next shot. Adjustments were usually made by observing and plotting the fall (splashes) of the shells fired and reporting by how much they were left or right in azimuth or over or under in range.〕 for various "non-standard conditions." This could include corrections to range and corrections to azimuth or deflection.〔See Chapter 4, "FM 4-15 Coast Artillery Field Manual-Seacoast Artillery Fire Control and Position Finding," U.S. War Department, Government Printing Office, Washington, 1940.〕 Corrections could be made, variously, for the following factors: # Variations in muzzle velocity (including the results of variations in temperature of powder) # Variations in atmospheric density # Variations in atmospheric temperature # Height of site (taking account of the level of the tide) # Variations in weight of projectile # Travel of the target during the time of the projectile's flight. # Wind # Rotation of the earth (for long range guns) # Drift.〔Drift refers to "the divergence of the projectile from the plane of departure due to its rotation, its ballistic character, and the resistance of air. It is generally in the direction of rotation...." See "The Service of Coast Artillery," Frank T. Hines and Franklin Ward, Goodenough & Woglom, New York, 1910, p. 21.〕 The uncorrected firing data, to which such corrections were applied, were those derived, for instance, from using a plotting board to track the position of an observed target (e.g., a ship) and the range and azimuth to that target from the guns of a battery. ==How the Corrections Were Made== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Corrected firing data」の詳細全文を読む スポンサード リンク
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