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Ordnance may refer to: Military and defense. Materiel in military logistics, including weapons, ammunition, vehicles, and maintenance tools and equipment;
The original draftsman's drawings for the area around St Columb Major in Cornwall, made in 1810. Detail from 1901 Ordnance Survey map of the Imperial fortress colony of Bermuda (showing St. George's Town and St. George's Garrison), compiled from surveys carried out between 1897 and 1899 by Lieutenant Arthur Johnson Savage, Royal Engineers.
The term descends from the Middle English dudde, originally meaning worn-out or ragged clothing, and is a cognate of duds (i.e., "clothing") and dowdy.Eventually dud became a general pejorative for something useless, including ammunition.
An Ordnance Survey cut mark in the UK Occasionally a non-vertical face, and a slightly different mark, was used. The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately ...
The engineering applications for ordnance delivery have likewise changed significantly over time, encompassing some of the most complex and advanced technologies in use today. In some armies, the weapon of artillery is the projectile, not the equipment that fires it. The process of delivering fire onto the target is called gunnery.
Ordnance workers inspecting cartridge cases in Los Angeles, 1943. The cartridge is the container that holds the projectile and propellant. Not all ammunition types have a cartridge case. In its place, a wide range of materials can be used to contain the explosives and parts.
Western cannons during the 19th century became larger, more destructive, more accurate, and could fire at longer range. One example is the American 3-inch (76 mm) wrought-iron, muzzle-loading rifle, or Griffen gun (usually called the 3-inch Ordnance Rifle), used during the American Civil War, which had an effective range of over 1.1 mi (1.8 km).
The origins of the broad arrow device used by the Board of Ordnance are debated. The symbol is widely supposed to have been derived from the pheon in the arms of the Sidney family, through the influence either of Sir Philip Sidney , who served as Joint Master-General of the Ordnance in 1585–6; or that of his great-nephew, Henry Sydney, 1st ...