This subject is familiar to most of the guys who grew up in the USSR. Odnoklassniki glanced with envy at the lucky owner of a transparent strip with a lot of holes in the form of various geometric figures. Nowadays this item is more of a rarity. Even the military itself is less likely to use paper cards.
A bit of history
The exact time when people began to use the ruler is unknown, but during the excavations of ancient Hellenic settlements buried under layers of sand and stone, archaeologists found smooth wooden planks with divisions. This is not surprising, because the architectural monuments of that era are impressive. The ancient designers who created these structures, probably in the development of projects used those or other drawing tools.
The line with modern measures of length appeared in France. One fine day people were tired of endlessly converting some measures of length to others (pounds, inches, arshins, elbows, etc.) and a meter was taken as a measure of length - one forty millionth of the circumference of the globe.
Well, like any human invention, the ruler, having been born, began to develop rapidly. What only rulers do not exist. Normal strip with tick marks. A ruler in the form of a square with different angles. The protractor, which is indispensable in drawing, is a semicircle with divisions into degrees, etc.
Why did the officers need a ruler
The military, planning their actions from time immemorial, used maps. And if the commanders of antiquity did not have any questions about how to plot the location of their troops and enemy forces on the map of the area, then in times close to modern times, everything was not so simple.
The success of the planned offensive often depended on the rigorous execution by subordinate units of a specific task at a fixed place and at a specified time. Not the last role in this was played by maps of the area, which the commanders had The locations of units, the direction of strikes and counterstrikes, the location of fortifications were plotted on them.
The troops have long ceased to consist only of cavalry and infantry. On the map it was necessary to designate machine-gun nests, and locations of communications, weapons calculations, positions of military equipment and much more.
It is because of the diversity of symbols and signs applied to military topographic maps, and it became necessary to unify all these symbols. The goal is to make a map developed by one officer, understandable and “readable” for all the rest of his colleagues in epaulettes. The standard officer line was widely used during the First World War, and at the same time all the opposing sides.
What is the officer line
Probably everyone knows what this drawing tool looks like. The officer's line is rather a stencil, with which you can put special marks on the paper. For ease of use is made, as a rule, from any transparent material. The USSR officer line was made from transparent celluloid. The material was not completely transparent, but had a yellow-gray color. In the modern Russian army, an officer’s line, cast from solid transparent plastic, is used.
Fans of antiques appreciate the Soviet version. But not only collectors pulls on antiquity. The officers, who, by occupation, still have to use the ruler, oddly enough, also prefer “Made in the USSR”. The fact is that the officer’s line, made of celluloid, practically does not break, unlike the modern colleague.
The line officer is not 100% universal. Some troops had separate species. Here, for example, the standard officer line. Photos from the standard set of officer tablet.
Not much different and the next option. This is a naval officer's line. The cadets of military schools also had their line.
And here is another officer line. Photo of the equipment of the US Army.
And such lines were found among the captured or killed German officers during the Great Patriotic War.
How to use it
Any of the following types of lines contains a set of various icons, which the military usually designate certain tactical units. It is enough to put a ruler, press and draw a necessary figure with a pencil. A whole set of various symbols and various figures (the contours of aircraft, ships, other pieces of equipment) contains any officer line.
Large-scale windows are designed to ensure that, without spending precious time on calculations, we can estimate the distance on a map in real units of measure. All other features of the standard line number 2 are the same as any other device for drawing. The individual edges of the officer line are made in the form of irregularities of various configurations. With their help, wavy lines are drawn on the map. Practically on all rulers there is a familiar protractor - angle meter.
Some copies have a site in the form of a magnifying glass, with which you can disassemble small symbols and inscriptions on the map.
Harder to use lineup specialized. For example, artillery officer line. This is a whole measuring device with which the gunner could calculate, in addition to the firing range, some parameters of a ballistic trajectory, a sector of fire, etc.