Why is it important to have a HERO-safe environment for handling arming devices?

A HERO-safe environment, which stands for "Hazards of Electromagnetic Radiation to Ordnance," is crucial in the context of handling arming devices primarily because it prevents accidental activation. Arming devices are often sensitive to electromagnetic emissions, and exposure to such radiation can inadvertently trigger them, leading to potential accidents or detonation.

Creating a HERO-safe environment minimizes this risk by ensuring that any electromagnetic sources are controlled or eliminated in areas where these devices are handled. This safety measure protects personnel as well as the integrity of the munitions itself, highlighting the paramount importance of maintaining strict protocols when dealing with sensitive ordnance. The other options, while they may address important aspects of handling munitions, do not specifically relate to the critical safety concern of preventing accidental activation in the context of HERO considerations.