What must be true about the cargo hook used for a UH-60 series aircraft?

The requirement that the cargo hook used for a UH-60 series aircraft must withstand a tensile strength of at least 8000 lbs is crucial for ensuring the safety and integrity of all sling load operations. This strength specification is essential because the cargo hook is responsible for securing and holding the load during transport. If the hook cannot tolerate the expected weight and forces, it could fail, leading to potential loss of cargo and creating hazardous situations for personnel and equipment both in the aircraft and on the ground.

Understanding the operational environment for the UH-60 series aircraft is critical; the loads carried can vary significantly in weight, and operational conditions can change rapidly. Therefore, a robust cargo hook that meets or exceeds this tensile strength requirement guarantees that the hook will perform reliably under varying weights and conditions, ensuring mission success and safety.

In terms of the other options, while they may outline various characteristics or preferences for cargo hooks, the specific requirement for tensile strength is paramount and directly relates to the primary function of the hook in maintaining load security during flight.