The officer line is a special device designed for the officer. It is made, as a rule, of transparent plastic, looks like a rectangle with various slots. Depending on one kind or another, patterns, stencils, a protractor, divisions for measuring distances or angles, for drawing conventional signs, for example, on topographic maps, can be placed on it.
Application area
An officer’s ruler is used, the photo of which you see above, mainly for orientation on a topographic map, to determine more accurate coordinates. In addition, with it you can easily measure angles, draw shapes, fonts and numbers.
Any officer line is a universal working tool that combines a variety of drawing devices. It is used mainly for making measurements (for example, on maps and plans), conveniently applying conventional symbols such as restricted areas, flood or fire zones , areas of radiation, biological or chemical contamination, the placement of various weapons and equipment on working documents. . Also, the officer’s line allows you to mark on the maps highways, column roads and special routes. In addition, with it you can create any graphic images, plans and diagrams.
Description
Any officer line includes (in addition to such a simple geometric measuring tool as a ruler) a scale scale, a protractor with a millimeter double-sided scale of division and cliches. In addition, it necessarily contains special inscriptions and images, as well as a variety of geometric shapes. For example, it can be rectangles, circles, triangles, squares and ovals.
Main types
At present, it is customary to distinguish between two main types of such a product - an officer’s naval line and a land line. The first is designed to simplify and speed up the laying of the path of various ships. Such a tool easily replaces the commonly used protractor and parallel ruler. In addition, it allows officers to dispense with the necessary compass correction calculations. Thus, it is possible to eliminate the possibility of design errors.
And finally, this simplest calculating and decisive mechanism makes it possible to “remember” the deviation table, as well as the course followed by the sea vessel, and the corresponding amendments to this course.
As for the land officer line, in addition to applying standard geometric figures and symbols, it allows you to make such designations as a gun (field gun, howitzer), machine gun (manual, easel), parachute (landing), communication station and observation post. In detail, the designations of all the characters represented on this tool, which, depending on the drawings inside and outside, can change their meaning, are described in a special training manual called “Commander’s working map”.