What is an officer's ruler

The officer's ruler is a special device designed for the work of an officer. It is made, as a rule, of transparent plastic, looks like a rectangle with various slots. Depending on one type or another, patterns, stencils, protractors, divisions for measuring distances or angles, for drawing conventional signs, for example, on topographic maps, can be placed on it.

Scope of application

The officer's ruler is used, the photo of which you see above, mainly for orientation on the topocard, to determine more accurate coordinates. In addition, it can be used to easily measure angles, draw shapes, fonts and numbers.

Any officer's ruler is a universal working tool that combines a variety of drawing devices. It is used mainly for measurements (for example, on maps and plans), convenient application of such conventional signs on working documents as restricted zones, flood or fire zones, areas of radiation, biological or chemical contamination, placement of various kinds of weapons and equipment. Also, the officer's ruler allows you to mark highways, column paths and special routes on maps. In addition, you can use it to create any graphic images, plans and diagrams.

Description

Any officer's ruler includes (in addition to such a simple measuring geometric tool as a ruler) a scale scale, a protractor with a millimeter double-sided scale of division and stencils. In addition, there are necessarily special inscriptions and images on it, as well as a variety of geometric shapes. For example, it can be rectangles, circles, triangles, squares and ovals.

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Main types

Currently, it is customary to distinguish between two main types of such a product - an officer's naval ruler and a land one. The first is designed to simplify and speed up the laying of the path of various vessels. Such a tool easily replaces the commonly used protractor and parallel ruler. In addition, it allows officers to do without performing the necessary calculations of the compass correction. Thus, it is possible to eliminate the possibility of calculation errors.

And finally, this simplest calculating and solving mechanism makes it possible to "remember" the deviation table, as well as the course followed by the ship, and the corresponding corrections on this course.

As for the land officer line, in addition to drawing standard geometric shapes and symbols, it allows you to make designations such as a cannon (field gun, howitzer), a machine gun (manual, easel), a parachute (landing), a communications station and an observation post. In detail, the designations of all the signs presented on this tool, which, depending on the drawings inside and outside, can change their meaning, are described in a special manual called "Commander's Work card".