Chapter 2. COUNTERMOBILITY FUNDAMENTALS. This chapter provides a standard classification and a detailed discussion of existing and reinforcing. Full text of “FM Countermobility” Countermobility support is divided into mine warfare and obstacle development, each with an ultimate goal of delaying, . FM Headquarters Department of the Army Washington, DC, 14 March C O U N T E R M O B I L I T Y. he foundation for engineer doctrine in .

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Countermobility support is divided into mine warfare and obstacle development, each with an ultimate goal of delaying, stopping, or channelizing the enemy. Making the boreholes is normally the most time-consuming task related to cratering. Countermobiljty through friendly minefield are marked by signs of various shapes placed not less than 20 meters apart on both sides of the route.

Counteermobility general, however, execution of denial target missions requires some technical or special training. Wire placed in the crater will add to countermobilityy difficulty of mine clearing. Small rivers, streams, and canals Minor fordable rivers, streams, and canals are much more numerous than major rivers and their tactical value as obstacles should not be overlooked.

Is the manpower available for labor- intensive obstacles? This publication contains technical or operational information that is for official Government use only.

Without existing bridges, forces must conduct river crossings using tactical bridging.

FM 5-102 Countermobility

Obstacles must be sited to reinforce the terrain and maximize the effective firepower from friendly battle positions. Weather effects Although streams are normally small and slow during periods of low precipitation, and large and rapid during periods of high precipitation, the relationship is not always this simple.

The obstacle effect becomes apparent long before any of the individual factors reach their critical values. Pros and cons must both be considered. Obstacles are also used to delay and disrupt an attacking force, upset the enemy’s timing and plans, and divert him into engagement areas and be destroyed.


The light, sheet metal, 5-centimeter-diameter, tubular sections are filled with cast trinitrotoluene TNT explosive at 9 kilograms per linear meter.

The terrain in Korea is rugged with narrow armor approaches between mountains. If the enemy is low on diesel fuel or ammunition, attacking their trains and supply lines may be the most effective use of obstacles such as scatterable mines. It clears a lane about meters long by 6 to 8 meters wide. Authorizing commander The authorizing commander has overall responsibility. Engineers must be completely familiar with the tactical plan, the countermobiity terrain, and the maneuver commander’s intentions.

The commander may employ and control specially trained teams or task forces to destroy all significant strategic targets, and make corps and their subordinate commands responsible for destruction of significant tactical targets. All elements of the combined arms team must be involved in the obstacle planning and employment process in order to extract the greatest cost from the enemy. Scuba- equipped engineers check for water mines and test riverbed conditions.

Watercourses frequently constitute elongated obstacles in terrain which may otherwise be excellent for movement. The enemy is forced to move on the battlefield in conformance with the friendly commander’s countefmobility.

As with any other denial target, care should be taken to minimize that impact. Both involve extensive destruction and both may require destruction of the same facility.

The obstacle value of each condition is evaluated individually in conjunction with trafficability. Successful commanders will need to concentrate forces at the decisive time and place, make maximum use of unit versatility, exercise movement and maneuver, impede the opposing force’s movement and maneuver, and preclude enemy reinforcement of committed units and their resupply.

Historically, swamps have been avoided by attacking armies. Although this distance may be wide enough for the vehicle to pass through, in most cases there is no room for turning. The previous section developed the concept of existing obstacles as a part of the terrain, and discussed their characteristics, identification, and analysis.



FM – Countermobility

Using mines with the obstacle increases countermobiliity effectiveness. The obstacle effect becomes apparent long before any of the individual factors reach their critical values. The countermonility has certain principles peculiar to combat engineers. Because military assets are always limited, however, denial operations must be planned and coordinated carefully to insure the military value of the target, and to determine the counermobility of destruction. No one substance is universally applicable therefore, technical familiarity with the target is required.

The operation of tank- mounted mine plows and rollers is a responsibility of armored forces, although engineer advice is available in deciding whether to employ such devices. Site protection Commencing with initial site preparation and continuing through the conduct of the crossing, engineer elements are responsible for protecting the site, equipment, and combined arms teams from floating mines and enemy raids. Where are good existing obstacles?

FM Countermobility – Chptr 6 Obstacles Other Than Minefields

The effect of combinations and variations of natural or cultural obstacles makes their evaluation a complex skill, one that requires experience and practice to develop its full potential. Because of the possible need to recover minefield as the advance progresses, antipersonnel mines are countermohility included in an antitank minefield laid in support of offensive operations.

Various combinations can be used. Banks made up of fine-grained soils may fail under repeated traffic. The residual radioactive contamination adds to the obstacle’s effectiveness.