Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

Terrain patency is characterized by the ability to move troops on it, and especially military and transport vehicles. Terrain patency is studied taking into account the task being performed, the tactical and technical data of military and transport equipment, as well as the time of year and weather conditions. 

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

When understanding the terrain of the war zone, they study the road network, as well as the terrain, hydrographic objects, vegetation and soil, which determine the conditions for off-road patency. Terrain, depending on its impact on speed, direction and the possibility of massive movement of military equipment is divided into easily passable, passable, impassable and impassable.

Easy terrain.

It does not limit the speed and direction of movement of wheeled tracked vehicles, allows unhindered use of military equipment in dissected systems and the movement of columns without reinforcing the soil.

Walkable area.

Almost does not limit the speed, direction of movement and allows repeated movement along one track of tracked vehicles, although separate places need to be bypassed or strengthened (equip walkways). The movement of wheeled vehicles with normal cross-country ability is somewhat difficult. On passable terrain, almost unhindered use of military equipment in dissected systems and the movement of columns, with the exception of certain directions, are possible.

Impassable terrain.

It allows the movement of tracked vehicles at low speed, limits the freedom of maneuver and the movement of several vehicles on one track. The movement of wheeled vehicles with normal cross-country ability is almost impossible. The use of military equipment in dissected systems is difficult for difficult terrain (it is possible that some of the vehicles will not pass under their own power). The movement of columns is possible only on roads and on specially equipped tracks.

Impassable terrain.

Not available for caterpillar and wheeled vehicles off-road.

Approximate data on terrain patency, equipment patency on various soils and snow.

The availability of slopes to climb on dry hard ground.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

The speed of movement on the terrain off-road, depending on the steepness of the ramps (with dry hard ground).

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

The availability of vertical walls (cliffs, escarp) and ditches (ditches, ravines) with dry hard ground.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

The degree of patency of upland, lowland, forest and continuous peat bogs.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

The degree of patency of various soils for equipment.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

Patency of various scaffolding for machinery.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

River ford.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

Passage of water barriers on ice.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

Snow cover for vehicles.

Terrain patency, approximate data on the patency of various types of terrain, patency of equipment on various soils and snow.

Based on materials from the Handbook of Military Topography.
A. M. Govorukhin, A. M. Kuprin, A. N. Kovalenko, M. V. Gamezo.

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