Which term describes ordnance that can be adversely affected by electromagnetic radiation?

• A. HERO safe
• B. HERO unsafe
• C. HERO susceptible
• D. HERO immune

Answer: (C)

When assessing ordnance around electromagnetic radiation, the important idea is how sensitive the item is to EMR exposure. Describing ordnance as HERO susceptible means it has a vulnerable behavior: electromagnetic energy could adversely affect its safety or function under certain exposure conditions. In practice, this classification signals that exposure to radar, high-powered radio frequency, or other EM sources could trigger an unsafe condition or misfire if proper controls aren’t in place. It’s a warning that you must manage and limit EMR exposure through procedures, stowage, or shielding to keep the ordnance safe.

By comparison, HERO safe would imply no adverse effects from EMR under normal conditions, HERO immune would indicate robust resistance to EMR, and HERO unsafe would imply a definite, high risk of detonation from EMR. The statement in question clearly aligns with susceptible, since it denotes potential harm rather than guaranteed harm or complete immunity.