What best describes a tandem load in sling loading?

A tandem load in sling loading refers to the configuration where two loads are rigged one in front of the other. This configuration is used to optimize the use of helicopter cargo space and can enhance the efficiency of air transport operations. In this setup, the loads are typically connected in such a way that allows them to be lifted simultaneously while maintaining stability and balance.

This distinction is essential because it affects how the load is secured and flown. The rigging must ensure that the front load does not obstruct the rear load and that both are properly balanced for safe flight. Understanding the proper configuration of tandem loads is crucial for effective sling load operations, as it directly impacts the safety and success of airlifting missions.

Other options describe different configurations that do not accurately capture the tandem load arrangement. For example, a single load or loads rigged side by side does not involve the stacking behavior characteristic of a tandem load, thus highlighting the unique nature of this specific rigging method.