What is a requirement for the hooks utilized in the CH-53E/K when not using additional equipment?

The requirement for the hooks utilized in the CH-53E/K, when not using additional equipment, is that each must have its own Static Discharge Man. This is critical for ensuring safety during sling load operations, particularly in environments where static electricity could pose a hazard. The Static Discharge Man helps to dissipate static charges that may build up on the helicopter and the load, reducing the risk of electric shock to personnel and ensuring that equipment functions correctly without interference from static discharge.

The other choices do not fulfill critical operational or safety requirements specific to the hooks on the CH-53E/K. Identical hooks are not a necessity; safety measures and discharge management take precedence. Having only one hook does not comply with operational protocols, as multiple hooks are designed to share load responsibilities during operations. Additionally, size specifications are typically set by operational standards but are not strictly limited to a minimum size requirement of 10 inches. Thus, the emphasis is firmly placed on the safety measures associated with static discharge management in sling load operations.