What is M9 paper used for in field operations?

• A. M9 paper is a field indicator used to detect liquid chemical agents on terrain, equipment, and clothing.
• B. M9 paper detects surface residues only.
• C. M9 is a shelter.
• D. M9 is a type of mask.

Answer: (B)

M9 paper serves as a quick field indicator for the presence of liquid chemical agents on surfaces. In field operations, soldiers use it to check terrain, equipment, and clothing for liquid contamination. The paper changes color when it contacts a liquid chemical agent, signaling the need for decontamination or protective measures. It is specific to liquids on surfaces and does not detect vapors in the air. This makes the description that it is used to detect liquid chemical agents on terrain, equipment, and clothing the most complete answer, since it covers where you would apply it and what it detects.