Small ordinance like HG's requires how many blocks of M112?

The correct choice indicates that small ordnance like hand grenades (HG's) requires one-half block of M112 explosives for their detonation. This choice reflects the standard practice for handling and preparing small munitions; using only the necessary amount of explosive material reduces unnecessary risks while ensuring effective and safe detonation.

Understanding the measurement of explosive blocks is crucial in ordnance handling, as it allows for more precise control in demolition and disposal scenarios. By using one-half block, personnel can effectively manage the power needed for initiating small ordinance without overestimating the explosive requirements. This practice is aligned with safety protocols and guidelines established for UXO management, ensuring both efficacy and safety.