Which marking indicates a fragment hazard in the U.S. Military Marking System?

• A. #3 in an X.
• B. #2 in an X.
• C. #4 in an X.
• D. #4 in a circle.

Answer: (B)

In the U.S. Military Marking System, an X-shaped mark signals fragmentation hazards. The numeral inside the X identifies which hazard type, and the mark with the numeral that corresponds to fragments indicates a fragment hazard. So the marking showing a fragment hazard is the X with the appropriate numeral inside that denotes fragments. The other marks—different numerals in the X or a number inside a circle—refer to other hazard types and are not the fragment hazard in this scheme. If you encounter this marking, treat the item as a fragmentation hazard, keep clear, and notify the appropriate authorities for safe handling.