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Weapons of Mass Destruction (WMD)

Field Behavior of NBC Agents
AFM 105-7 / FM 3-6 / FMFM 7-11-H
Field Manual No 3-6
Air Force Manual No 105-7
Fleet Marine Force Manual No. 7-11-H


Primary users of this manual are NBC staff officers, staff weather officers, fire support coordination personnel, artillery officers, and others involved in planning NBC operations. These soldiers must understand what effect weather and terrain have on nuclear, biological, and chemical (NBC) operations and smoke. This manual contains general information and the basic principles on how to get the best results. Commanders and staffs involved in planning for use of incendiaries or smoke operations will also benefit from the use of this manual along with other references such as FM 3-50, FM 3-100, FM 3-3, FM 3-4, and FM 3-5.

On the battlefield, the influences of weather and terrain on NBC operations provide opportunities to both sides. To retain the initiative, friendly forces leaders and staff officers must understand how weather and terrain can be used to their advantage.

FM 3-6 implements International Standardization Agreement (STANAG) 2103, Reporting Nuclear Detonations, Radioactive Fallout, and Biological and Chemical Attacks and Predicting Associated Hazards.

This manual explains how weather and terrain influence nuclear, biological, and chemical operations and discusses the following topics for use when planning operations:

  • Basic principles of meteorology as they pertain to NBC operations.

  • Influence of weather on the use and behavior of NBC agents.

  • Local weather predictions and their use.

  • Influence of terrain on the behavior of NBC agents.

  • US Air Force Air Weather Service (AWS) forecasts and their use in planning for operations in an NBC environment. (The Navy gets meteorological forecasts from components of the Naval Oceanography Command. Meteorological report information is in the NAVOCEANCOMINST 3140.1 publications series. It also contains information on the behavior of smoke clouds and incendiaries. In addition, it discusses the influences of weather and terrain on the thermal, blast, and radiation effects of a nuclear detonation.)

Staffs planning the use of chemical weapons and commanders approving strikes must understand basic weather characteristics. Therefore, weather analyses significantly influence the selection of agents and munitions for employment. The target analyst must know his or her weather data needs and where to get this information in a combat environment. Chapter 1 covers meteorology and the impact of weather on chemical agent use. The remaining chapters address the impact of weather on smoke, incendiaries, biological agents, and nuclear detonations.

Users of this publication are encouraged to recommend changes and submit comments for its improvement. Key each comment to the specific page and paragraph in which the change is recommended. Provide a reason for each comment to ensure understanding and complete evaluation. To send changes or comments, prepare DA Form 2028 (Recommended Changes to Publications and Blank Forms) and forward it to Commandant, USACMLS, ATTN: ATZN-CM-NF, Fort McClellan, AL 36205-5020. Air Force comments go to HQ USAF/XOORF, Washington, DC 20330. Marine Corps comments go to Commanding General, Marine Corps Development and Education Command (CO93), Quantico, VA 22134. Navy comments go to Chief of Naval Operations (OP-954), Navy Department, Washington, DC 20350.

* This publication supersedes TM 3-240/AFM 105-7, 15 April 1969.
05-21-1996; 08:48:40

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